GL-PD-11-01 Boot Combat Temperate Weather Army 3-11-2011 MS.pdf

GL-PD-11-01

11 March 2011

PURCHASE DESCRIPTION

BOOT, COMBAT, TEMPERATE WEATHER, ARMY

This Purchase Description is approved for use by all Departments and Agencies of the Department of Defense (DoD).

1. SCOPE

1.1 Scope. This Purchase Description covers the requirements for a Desert Sand-colored, waterproof, temperate weather combat boot for Infantry, Flight and Combat Vehicle Crewman use.

1.2 Classification. The boot will be available in the following sizes and widths as specified (see

6.2).

1.2.1 Schedule of sizes and widths.

Size: 2 through 15 (whole and half sizes), 16 (whole size only)

Widths:

Narrow (B) Wide (EE)

Regular (D) X-Wide (EEEE)

2. APPLICABLE DOCUMENTS

2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed.

2.2 Government documents.

2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract.

Comments, suggestions, or questions on this document should be addressed to: Department of the Army, Natick

Soldier Research, Development and Engineering Center, Kansas St., Natick MA 01760. ATTN: RDNS-WPW-C.

FSC 8430

INCH-POUND

COMMERCIAL ITEM DESCRIPTIONS

A-A- 55093 - Laces, Nylon

DEPARTMENT OF DEFENSE SPECIFICATIONS

MIL-C-41814 - Counter, Footwear

MIL-DTL-32075 - Label: For Clothing, Equipage, and Tentage, (General Use)

MIL-PRF-3122 - Leather, Cattlehide, for Footwear for Uppers and Gussets, Chrome

Tanned, Fatliquored

(Copies of these documents are available online at https://assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA

19111-5094.)

2.2.2 Other Government documents. The following other Government documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues shall be those cited in the solicitation or contract.

DRAWINGS

DLA TROOP SUPPORT

2-1-1635 - Speed Lace Assembly

(Copies of drawings are available from the DLA Troop Support, 700 Robbins Avenue, Philadelphia, PA 19111-5096, Attn: DSCP-CRFD-TDR.)

(Copies of documents required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.)

ENVIRONMENTAL PROTECTION AGENCY

Regulations for the Enforcement of the Federal Insecticide, Fungicide and Rodenticide Act (40

CFR Part 162)

(Copies are available online at http://www.epa.gov pesticides or from the Environmental Protection

Agency, 1200 Pennsylvania Avenue, N.W., Washington, DC 20460.)

FEDERAL TRADE COMMISSION

Rules and Regulations Under the Textile Fiber Products Identification Act

(Copies are available online at http://www.ftc.gov or from the Federal Trade Commission, 600

Pennsylvania Avenue, N.W., Washington, DC 20580-0001.)

http://www.epa.gov/ http://www.ftc.gov/

2.3 Non-Government standards and other publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents are those cited in the solicitation or contract (see 6.2).

AMERICAN ASSOCIATION OF TEXTILE CHEMISTS AND COLORISTS (AATCC)

AATCC Test Method - 22 Water Repellency: Spray Test

AATCC Test Method - 100 Assessment of Antibacterial Finishes on Textile Materials

AATCC Test Method - 118 Oil Repellency, Hydrocarbon Resistance Test

AATCC Test Method - 127 Water Resistance: Hydrostatic Pressure Test

AATCC Evaluation Procedure 9, Visual Assessment of Color Difference of Textiles

(Copies of documents are available on line at http://www.aatcc.org or from the American

Association of Textile Chemists and Colorists, P.O. Box 12215, Research Triangle Park, NC

27709-2215.)

AMERICAN SOCIETY FOR QUALITY

ANSI/ASQ Z1.4 - Sampling Procedures and Tables for Inspection of Attributes

(Copies are available online at http://www.asq.org or from the American Society for Quality, 600

North Plankinton Avenue, Milwaukee, WI 53203.)

AMERICAN TYPE CULTURE COLLECTION (ATCC)

ATCC – 6538 - Staphylococcus Aureus

ATCC – 9027 - Pseudomonas Aeruginosa

ATCC – 373 - Corynebacterium Xerosis

(Information available online at http://www.atcc.org or from the American Type Culture

Collection (ATCC), P.O.Box 1549, Manassas VA 20108 USA.)

ASTM INTERNATIONAL

ASTM D 297 - Standard Test Methods for Rubber Products-Chemical Analysis

ASTM D 412 - Standard Test Methods for Vulcanized Rubber and Thermoplastic

Elastomers (Tension Elongation)

ASTM D 471 - Standard Test Methods for Rubber Property-Effect of Liquids

ASTM D 624 - Standard Test Methods for Tear Strength of Conventional Vulcanized

Rubber and Thermoplastic Elastomers

ASTM D 751 - Standard Test Methods for Coated Fabrics (Hydrostatic Resistance or

Breaking Strength)

ASTM D 1052 - Standard Test Methods for Measuring Rubber Deterioration-Cut Growth

Using Ross Flexing Apparatus

ASTM D 1630 - Standard Test Methods for Rubber Property-Abrasion Resistance

(Footwear Abrader)

ASTM D 1777 - Standard Test Methods for Thickness of Textile Materials http://www.aatcc.orgul/ http://www.asq.org/ http://www.atcc.org/

ASTM D 2208 - Standard Test Methods for Breaking Force and Elongation, Grab Method

ASTM D 2240 - Standard Test Methods for Rubber Property-Durometer Hardness

ASTM D 3273 - Standard Test Methods for Resistance to Growth of Mold

ASTM D 3574 - Standard Test Methods for Flexible Cellular Materials- Slab, Bonded, and

Molded Urethane Foams

ASTM D 3787 - Standard Test Methods for Bursting Strength of Textiles Constant-Rate-of-

Traverse (CRT) Ball Burst Test

ASTM D 3886 - Standard Test Methods for Abrasion Resistance for Textile Fabrics

(Inflated Diaphragm Apparatus)

ASTM D 4786 - Standard Test Methods for Stitch Tear Strength, Single Hole

ASTM D 4966 - Standard Test Methods for Abrasion Resistance of Textile Fabrics

(Martindale Abrasion Tester Method)

ASTM E 18 - Standard Test Methods for Rockwell Hardness and Rockwell Superficial

Hardness of Metallic Materials

ASTM E 96 - Standard Test Methods for Water Vapor Transmission of Materials

ASTM F 392 - Standard Test Methods for Flex Durability of Flexible Barrier Materials

ASTM F 1614 - Standard Test Method for Shock Attenuating Properties of Materials

Systems for Athletic Footwear

(Copies of documents are available online at http://www.astm.org or from the ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959.)

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA-1971 - Standard on Protective Ensemble for Structural Firefighting (2007 Edition)

(Application for copies should be addressed to National Fire Protection Association, 1 Batterymarch

Park, Quincy, MA 02269-9101)

SATRA GLOBAL TEST METHODS

TM2 - Tensile properties of insole materials

TM3 - Flexing index

TM14 - Resistance to scuffing by mild circular abrasion

TM31 - Abrasion resistance - Martindale method

TM64 - Compression set - constant stress method

TM77 - Flexing Machine-Water Penetration Test

TM80 - Transverse tensile strength of sheet materials

TM83 - Measurement of the Area Shape Retention and Collapsing Load of

Formed Toe Puff and Stiffener Materials

TM98 - Dimensional stability with changes in atmospheric humidity

TM101 - Peel Strength of Fiberboards

TM144 - Friction (slip resistance) of footwear and floorings

TM184 - Friction of insocks

TM223 - Floor marking by solings or top pieces http://www.astm.org/

(Application for copies should be addressed to SATRA Technology Center, SATRA House;

Rockingham Road, Kettering, Northamptonshire; NN 16 9 JH, England.)

OTHER PUBLICATIONS

Repeat Insult Patch Test - Modified Draize Procedure -

Principles and Methods of Toxicology, (fourth edition) A Wallace Hayes (editor), pp 1057 – 1060, 2001.

(Copies are available online at http://www.taylorandfrancis.co.uk/ or from Taylor and Francis, 325

Chestnut Street, Philadelphia PA 19106.)

2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.

3. REQUIREMENTS

3.1 Terms

3.1.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.2.

3.1.2 Standard sample. The finished leather shall match a swatch of cattlehide leather for shade and sueded flesh appearance and unless otherwise indicated, shall be equal to or better than the sample with respect to all characteristics for which the standard is referenced.

3.1.3 Visual shade matching (All components). The color and appearance of the components shall match the standard for shade and appearance (see 3.1.2) when tested as specified in 4.4.2.

3.2 Recycled, recovered, or environmentally preferable materials. Recycled recovered or environmentally preferable materials should be used to the maximum extent possible provided that the material meets or exceeds the requirements of this document and promotes economically advantageous life cycle costs.

3.2.1 Leather.

3.2.1.1 Upper leather. The leather shall be flesh out drum dyed Desert Sand with color penetrating throughout the thickness of the hide so that the chrome tannage is not visible. The leather for the vamps, quarters, backstay/pull-tab shall conform to MIL-PRF-3122, Type I, Treatment A and Treatment B. The leather for the eyelet stays; top band and gusset/tongue shall conform to MIL-PRF-3122, Type II, Treatment A. The following exceptions to MIL-PRF-3122 shall be applicable for the upper leathers:

a. The flesh surface shall be sueded as to produce a fine uniform nap.

b. The grain surface shall be lightly buffed to remove the surface of the grain only.

c. The finish requirements for the leather shall not apply.

d. The tear strength requirements for the eyelet stays and top band shall not apply. Eighty percent (80%) of the gusset/tongue leather samples must meet a minimum of 23 pounds stitch tear.

e. The thickness shall be as specified for the cut parts in Table IX.

f. As an option, the eyelet stays may conform to MIL-PRF-3122, Type I, Treatment A and

Treatment B.

3.2.1.2 Leather oil repellency. The leather shall receive a minimum grade of 5.0 when the leather surface is tested as specified in 4.4.2.

3.2.1.3 Leather resistance to wetting. The leather shall receive a minimum grade of 7.0 when the leather surface is tested as specified in 4.4.2.

3.2.2 Insoles The insole shall meet the requirements specified in Table I when tested as specified in 4.4.2.

TABLE I. Insole performance requirements

Characteristics Physical Requirements

Thickness (all constructions), inches

(minimum)

0.090

Fungal resistance Level 10

Wet Tensile, kgf/cm (minimum) 70

Flexing Index, (5000 cycles) (minimum) 3.7

Abrasion Resistance

Cellulose board, mm (maximum)

Non-Woven board, revs (minimum)

Dry

Wet

25,600

Transverse Tensile-Dry, kgf/cm

(minimum) 8.0

Dimensional Stability, percent (maximum) 0.7

Peel Strength, kgf/cm

(minimum) 0.5

3.2.3 Fabrics.

3.2.3.1 Bootie lining. The bootie lining shall be constructed from pattern pieces cut from waterproof 3-layer laminate material.

3.2.3.1.1 Three-layer laminate. The three-layer laminate lining shall consist of a textile face, a waterproof film, and a tricot knit cloth. The package shall conform to the requirements in 3.2.3.1.1.1 through 3.2.3.1.1.3. The three-layer laminate shall conform to the requirements specified in Table II, when tested as specified in 4.4.2.

3.2.3.1.1.1 Face layer. The face layer shall consist of a textile that meets the Martindale

Abrasion, Burst Strength and Bacterial Resistance performance listed in Table II when tested as specified in 4.4.2.1. Any antimicrobial technology used shall be an EPA-registered antimicrobial and shall be durable for the life of the item. The requirements of this paragraph shall apply to all lining within the boot including the fabric top cover attached to the removable cushioned insert.

3.2.3.1.1.1.1 Toxicity. The finished lining fabric shall not present a health hazard and shall show compatibility with prolonged, direct skin contact when tested as specified in 4.4.2.1.1 and

4.4.2.1.2. Chemicals recognized by the Environmental Protection Agency (EPA) as human carcinogens shall not be used.

3.2.3.1.1.2 Waterproof film. The waterproof film shall be polytetrafluorethylene, microporous.

3.2.3.1.1.3 Tricot knit. The tricot knit cloth shall be nylon weighing a minimum of 1.0 ounces per square yard and meet the requirements in Table II when tested as specified in 4.4.2 as part of the three-layer laminate lining specified in 3.2.3.1.1. The color shall be natural unless otherwise specified in the contract or solicitation.

3.2.3.2 Adhesive. The adhesive for laminating the layers together shall be such that the laminate cloth meets the requirements of this specification. The adhesive shall have no adverse health hazard when used as intended.

3.2.3.3 Laminated cloth. The face layer specified in 3.2.3.1.1.1 shall be laminated to one side of the waterproof film specified in 3.2.3.1.1.2 and the tricot knit cloth specified in 3.2.3.1.1.3 shall be laminated to the other side of the waterproof film. The cloth shall conform to the requirements specified in Table II, when tested as specified in 4.4.2.

TABLE II. Laminated cloth performance requirements

Characteristics Requirements

Martindale Abrasion (Fabric Only)

Dry (153,600 revs), cycles (minimum)

9,600

Bursting Strength (lbs.)

Fabric Only (minimum)

Bacterial Resistance , percent reduction (minimum)

Staphylococcus Aureus

Pseudomonas Aeruginosa

Corynebacterium Xerosis

Hydrostatic Resistance, pounds /square inch (psi)

(Liner cloth)

Initial (minimum)

At seam (minimum)

After synthetic perspiration (minimum)

After diesel fuel oil (minimum)

Water Permeability/ Resistance ( Liner cloth)

Initial (minimum)

At seam (minimum)

After synthetic perspiration (minimum)

After diesel fuel oil (minimum)

No leakage

No leakage

No leakage

Abrasive Durability (600 cycles)

Back / Leather Side (minimum)

Moisture Vapor Transmission Rate (MVTR), g/m /24hrs

B method (minimum)

BW method (minimum)

4,000

Flex Durability

Gelbo (3,000 cycles) (minimum)

Wet, (24 hours to leak) (minimum)

Wet, (96 hours to delamination) (minimum)

3.2.3.4 Color. The color of the face side of the laminated cloth shall be gray based on

Government approval unless otherwise specified in the contract or solicitation.

3.2.4 Comfort top band. The comfort top band shall be leather (see 3.2.1.1) and shall have a length equal to the circumference of the boot top, exclusive of the gusset/tongue, and a width of 3/4

(± 1/8) inch. As an option, the Top Band may be stitched flesh-side-out both inside and outside the boot.

3.2.5 Two-layer quarter side panels. The fabric for the quarter side panels shall be Desert Sand in color unless otherwise specified, 100 percent nylon 6,6 or equal; 2x2 basket weave, 140 filaments per inch of 1,000 denier in both warp and filling direction; weighing 13.7 (± 1.3)

(ounce per square yard). The material shall be fungal resistant, extremely water resistant and backed with a polytetrafluorethylene, microporous membrane. The two-layer material shall conform to the physical requirements listed in Table III when tested as specified in 4.4.2.

Construction of the end item shall be such that the seam strength between the 1000-denier nylon and all other components is adequate for the life of the item.

TABLE III. Quarter side panel fabric requirements

Characteristics Physical requirements

Water Repellency (minimum) 90, 90, 90 1/

1/ These AATCC Test Method 22 Standard Spray Test Ratings are equivalent to an ISO 4 rating (see 6.5).

3.2.6 Leather pull tab. The boot shall contain a one-piece backstay and pull tab which shall be leather (see 3.2.1.1) flesh side out, with a pull tab circumference of 3-1/2 to 3-3/4 inches when completed. Testing shall be as specified in 4.4.2.

3.2.7 Box toe. The box toe material shall be a laminate of 0.020 (± 0.002) inch virgin ionomer resin (surlyn) sandwiched between two layers of non-woven polyester saturated with polystyrene.

The total thickness shall be 0.056 (± 0.005) inch. The box toes shall be skived 3/8 (± 1/8) inch wide at the breast. Testing shall be as specified in 4.4.2. A thermoplastic box toe may be used and shall conform to the performance requirements of Table IV.

TABLE IV. Thermoplastic performance requirements

Initial Collapsing Load , Newtons (N) (minimum) 130

Resilience, percent (%) (minimum) 1/ 25 1/

Moisture Resistance, percent (%) (minimum) 2/ 80 2/

Area Shape Retention, percent (%) (minimum)

Initial, percent (%) (minimum) 85 th collapse, percent (%) (minimum) 60

1/ Resilience is percentage retention of initial collapsing load after ten collapses.

2/ Moisture resistance is percentage retention of initial dry collapsing load after 1 hour immersion.

3.2.8 Counters. Counters shall conform to the requirements of MIL-C-41814. The counter shall conform to fit the last used and fill the counter pocket area. The physical requirement for single-hole tear strength of MIL-C-41814 is eliminated. As an alternative, counters manufactured from leather board need not meet the chemical requirements of MIL-C-41814 but must meet the fungicide requirements of MIL-PRF-3122. An extruded thermoplastic film sandwiched between fusion bonded non-woven fabric made from a blend of synthetic fibers and impregnated with a styrene co-polymer and coated on each side with a thermoplastic adhesive may be used. A

Thermoplastic counter may be used and shall conform to the performance requirements of Table IV.

3.2.9 Shanks. The steel or fiberglass shanks shall be bonded to the insole and shall conform to the shape of the last. The fiberglass shank (glass and resin area), when cured, shall be 5/8 (± 1/16) inch in width. The steel shank shall be constructed from 19 gauge, cold rolled carbon steel with a hardness ranging from 47 to 54 Rockwell C scale. The width of the steel shank shall be 5/8 (± 1/32) inch for boot sizes 2 through 6-1/2 (all widths), 7 through 8-1/2 N, and all R widths. For all other sizes and widths, the steel shank width shall be 1 (± 1/32 inch). The shank shall be made with two ribs for the 5/8 inch width and three ribs for the 1 inch width. Testing shall be as specified in 4.4.2.

3.2.10 Eyelets. There shall be five (5) pair of eyelets below the comfort notch for all sizes.

The eyelets shall be brass, with a coated Desert Sand finish, size AA. Testing shall be as specified in 4.4.2.

3.2.11 Speed lace configuration and assembly. The speed loops shall be positioned above the comfort notch. The loops shall be brass with a coated nylon Desert Sand finish. Testing shall be as specified in 4.4.2. The number of speed loops above the comfort notch shall be as follows: Sizes 2-

13 (whole and half sizes) shall have four (4) speed loops; Sizes 14-16 (whole and half sizes) shall have five (5) speed loops. Speed lace assembly shall conform to Drawing 2-1-1635.

3.2.12 Quarter foam. There shall be open cell quarter foam, 3/16 (± 1/32) inch thick, located next to the bootie lining. The foam shall cover the counter area and extend upward to within 2 inches from the top of the boot.

3.2.13 Laces. The laces shall conform to Type III, Class 1 of A-A-55093. The color of the laces shall be Desert Sand unless otherwise specified in the contract or solicitation. The length of the laces shall be a minimum of 72 inches for sizes 2 through 6-1/2, 87 inches for sizes 7 through

11, and 97 inches for sizes 11-1/2 through 16.

3.3 Soling system requirements.

3.3.1 Midsole construction and design. The cushion midsole shall be directly attached to the upper and shall be achieved either through an injection molding or open pouring method. The design shall be as shown in Figures 2a and 2b. The cushion midsole shall be pure polyether polyurethane, Desert Sand color and have an exterior texture pattern that is a good match to the

Government standard sample. The dimensions of the cushion midsole shall be sufficient to meet all of the salient characteristics listed within this Purchase Description.

3.3.2 Midsole compound requirements. The requirements for the pure polyether polyurethane cushioned midsole are based on testing done on slabs (according to ASTM procedures) and are not actual soles. The requirements shall be as specified in Table V when tested in accordance with

4.4.2.

TABLE V. Midsole polyether polyurethane requirements

Characteristics Minimum Maximum

Density (gm/cc) 0.40 0.60

Hardness (shore A) 50 75

Tensile strength (kgf/cm sq) 25 N/A

Elongation (Percent) 250 N/A

Tear Strength

Die T (kg/cm)

3.7

N/A

Volume Swell (Percent) w/ASTM Oil #3 (at 24 hrs)

Compression Set (Percent) N/A 20

Ross Flex (1 inch X 6 inch) at -5 °C

(Percent)

150,000 cycles

3.3.3 Outersole. The outersole design shall be the Quabaug Vibram 360-Degree Lug Model

(See Figure 3). The outsole shall be a minimum of 18-iron, 9.5 millimeters (mm) in thickness of solid rubber at each of the lugs. The color of any identification plug shall be Desert Sand in color unless otherwise specified in the contract or solicitation.

3.3.3.1 Rubber outersole compound requirements. The requirements for the rubber outsole are based on testing done on slabs (according to ASTM procedures) and are not actual soles. The requirements shall be as specified in Table VI when tested in accordance with 4.4.2.

TABLE VI. Rubber outsole compound requirements

NBS abrasion (minimum) 120

Hardness (shore A) 57-67 A

Stitch Tear, pounds (minimum)

Dry

Fuel B

Die C tear strength, pounds (minimum) 250

Ross flex, Oil #3, percent (maximum)

50,000 flexes

Volume swell, percent (maximum)

Fuel B (46 hrs)

Non-marking Pass

Tensile, pounds (minimum) 2,100

Elongation, percent (minimum) 400

TABLE VI. Rubber outsole compound requirements – Continued

Cold Flex (-23 °C), percent after

7,500 flexes (maximum)

500 %

Transitional Hardness, change after

2 hrs at -23°C (maximum)

+10 point shore hardness

Slip Index (cold/ice),(rough ice method)

0.20

3.3.4 Shock attenuation and kinematic parameters. Whole boot shock attenuation as measured in accordance with ASTM F 1614 shall be optimized for user comfort and injury reduction, and shall not exceed 18.0 G in the forefoot and shall not exceed 14.0 G in the rearfoot. Shock attenuation shall be achieved through the choice of standard materials and construction techniques used in commercial industry and found in this Purchase Description. Human biomechanical gait parameters while wearing combat boots shall not be compromised to achieve increased shock attenuation. Testing shall be performed on the completed boot with the removable cushion insert.

3.3.5 Bond strength. The bond achieved between the boot upper, cushion midsole, and outsole shall be resistant to any delamination for the life of the item.

3.3.5.1 Entire system to upper. The bond strength shall not be less than 130 pounds. Testing shall be performed on the end item as specified in 4.4.4.

3.3.5.2 Outersole to cushion midsole bond strength. The outersole to cushion midsole strength shall not be less than 100 pounds. Testing shall be performed on the end item as specified in 4.4.4.

NOTE: The components of the sole shall be layered in such a manner that the specified bond strengths will be achieved. If test results find values to be less than specified due to material failure, in regards to the bond between the layers, the test shall be classified as a failure.

3.3.6 Removable cushion insert. The removable cushion insert shall be a polyether polyurethane heel cup support made of a polyurethane system and shall meet the requirements of

Table VII when tested as specified in 4.4.2, medium black in color, and molded to a cloth, black in color unless either is otherwise specified in the contract or solicitation. The fabric top cover shall meet the performance requirements in 3.2.3.1.1.1. Cushioned inserts shall be mated by size, to the correct size boots and shall be uniform. The total thickness of the insert shall be 0.180 (± 0.025) inch forward of the instep, and 0.250 (± 0.030) inch elsewhere. Testing shall be as specified in

4.4.2.

3.3.7 Insole board foam top-layer. Microcellular polyurethane foam, 0.125 (± 0.01) inch thick, shall be permanently attached to the top of the insole board. The foam shall meet the requirements of Table VII when tested as specified in 4.4.2.

TABLE VII. Insole Board Foam Requirements

Removable Cushion Insert

Density, lbs/cu.ft. 16-19

Foam Hardness, Shore 00 50-65

Tensile strength, pounds per square inch (psi)

Compression set @ 25%, percent (maximum) 5

Compression set @ 50%, percent (maximum) 5

Insole Board Foam

Density (lb/cu.ft) 19 - 23

Tensile Strength ( Pounds per sq.inch -PSI)

(Minimum)

Compression set (Percent) ( Maximum)

At 50% compression, 23 °C

At 50% compression, 70 °C

Resilence/Ball Rebound (Minimum) 8

3.4 Design. The boot shall be Desert Sand-colored unless otherwise specified in the contract or solicitation, have a toe up lace closure system with “V” notch; breathable, waterproof and mildew-resistant. The boot shall be flesh-side out Desert Sand leather, with nylon quarters; lined;

comfort top band; replaceable rubber outsole; and pure polyether polyurethane cushion midsole.

The soling system shall be Direct Attach with a solid rubber outsole. (See Figures 2a and 2b for upper pattern design requirements and Direct Attach soling system design requirements)

3.4.1 Boot height. The height of the finished boot, measured upward on the outside from the bottom of the tread area at the breast of heel area to the top of the boot, shall be 10.0 (± 1/4) inches on size l0R and shall graduate up and down between sizes and widths. Testing shall be as specified in 4.4.4.

3.4.2 Boot weight. The weight of a finished boot (size 10R) shall be less than or equal to 2.0 pounds per boot when tested as specified in 4.4.4.

3.5 Lasts and molds.

3.5.1 Direct attach soling construction lasts and molds. The boots shall be made on commercial last model “FMT U3813-1 Military” or equal based on Government approval. An electronic table of last dimensions as well as last bottom files for each size and 3-dimensional data file for sizes 10N

(B), 10R (D), 10W (EE) and 10XW (EEEE) for the Direct Attach lasts are available from U.S.

Army Natick Soldier Research Development and Engineering Center, RDNS-WPW-C, Kansas

Street, Natick, MA 01760-5011. The numerical size of the boot shall correspond with the numerical size of the last used to produce the boot (i.e. a size 10R boot shall be produced on a size

10R last). The Direct Attach last has a common last bottom shared by N and R lasts and a common last bottom shared by W and XW lasts for each whole and half size. The Direct Attach (either

Injection Molding or Open Pouring) process shall utilize a separate cushion midsole mold to produce N and R widths for each whole and half size. The Direct Attach process shall use a separate cushion midsole mold to produce W and XW widths for each whole and half size. The total number of molds required to produce the full size tariff shall be fifty eight (58) molds.

3.6 Construction.

3.6.1 Cutting uppers. The leather shall conform to the thickness specified in Table VIII. With the exception of the eyelet stays, none of the upper parts shall be split or shaved. Vamps shall be cut from the bend area of the side leather.

TABLE VIII. Required thickness (ounces) of leather uppers

Part Minimum Maximum

Vamp 5 6

Foxing 4-1/2 6

Eyelet stay 2-1/2 3-1/2

Gusset/tongue 2-1/2 4

Comfort top band 2-1/2 3-1/2

Backstay/pull-tab 4-1/2 6

3.6.2 Skiving. Skiving of upper leather parts shall be permitted.

3.6.3 Boot finishing. No finish or top coat shall be used.

3.7 Leakage and safety requirements.

3.7.1 Leakage. The finished boots shall show no evidence of leakage when tested as specified in 4.4.4.

3.7.2 Whole boot moisture vapor transmission rate (MVTR). The whole boot breathability shall not be less than 5.0 grams per hour. Testing shall be as specified in 4.4.4.

3.7.3 Thermal protection. The boots shall meet the flame, heat and liquid penetration resistance requirements. Testing shall be as specified in 4.4.4.

3.7.3.1 Flame resistance. The boots shall meet the Flame Resistance Test Four requirements of NFPA 1971 when tested as specified in 4.4.4.

3.7.3.2 Upper heat resistance. The boots shall meet the Thermal Conductive Heat Resistance

Test One requirements of NFPA 1971 when tested as specified in 4.4.4.

3.7.3.3 Sole heat resistance. The boots shall meet the Thermal Conductive Heat Resistance Test

Two requirements of the NFPA 1971 when tested as specified in 4.4.4.

3.7.3.4 Liquid penetration resistance. The boots shall meet the Liquid Penetration Resistance

Test requirements of the NFPA 1971 when tested as specified in 4.4.4.

3.8 Marking, permanent identification. With the exception of Product Demonstration Models

(PDMs), the Contractor shall permanently mark the correct American and Mondopoint sizes and widths, the contract number (Example: 04-D-1234), and the company or brand name on the inside of the boot in the shaft or gusset area. The marking may be in the form of a label and shall be done in accordance with acceptable commercial practices, and it shall not reduce footwear functionality.

The boot shall contain a manufacturing tracking lot number. Embossing of a company or brand name on the exterior of the boot shall not be permitted. Unit packs will include NSN and UPC bar codes as specified in the contract. Each symbol must be Human and scanner readable.

3.8.1 Instruction tag. The instruction label/tag shall be tied to the finished boots, and the print size shall be 1/8 (± 1/32) inch. The instruction label/tag shall be printed using the data specified in

Figure 1. Each item shall be individually bar-coded with a label/tag conforming to Type VIII, Class

17, of MIL-DTL-32075. The bar-coding element shall be a 13 digit national stock number (NSN).

The bar-code type shall be a medium to high code density. It shall be located so that it is completely visible on the item when it is folded and/or packaged as specified in the contract and in a manner that causes no damage to the item. As an option, a hang tag identifying the features of the boot shall be permitted.

3.8.2 Labels. The contractor shall attach an internal label with the words: “This NSN

Authorized for US Army Flight and Combat Vehicle Crewman Use”. As an option, each boot may contain a sew-in label identifying the waterproof membrane used. Component and boot feature hangtags may be attached to the boots.

3.9 Workmanship. The finished boots shall conform to the quality of product established by this document. The occurrence of defects shall not exceed the contractor's own quality assurance standards and the quality assurance standards defined by the technical data in the bid package.

3.10 Standard sample. The standard sample for color shade and sueded flesh appearance of leather as well as color shade of components shall be a swatch of cattlehide upper leather. The standard sample for texture pattern for the exterior surface of the Direct Attach cushion midsole shall be a finished boot.

4. VERIFICATION

4.1 Classification of inspections. The inspection requirements specified herein are classified as follows:

a. First article inspection (see paragraph 4.2).

b. Conformance inspection (see paragraph 4. 3).

4.2 First article inspection. First article inspection when required (see 3.1) shall be examined for the defects specified in 4.4.3 and tested for the characteristics in 4.4.4.

4.3 Conformance inspection. Conformance inspection shall include the examinations of 4.4.1 and 4.4.3 and the testing in 4.4.2 and 4.4.4. Unless otherwise specified sampling for inspection shall be performed in accordance with ANSI/ASQ Z1.4.

4.4 Inspection and component testing.

4.4.1 In-process inspection. Inspection may be made by the Government at any point or during any phase of manufacturing to determine whether the components are as specified or operations and/or assemblies are accomplished as specified. The Government reserves the right to exclude from consideration for acceptance any material or service for which in-process inspection has indicated nonconformance.

4.4.2 Component testing. The components shall be tested for the characteristics listed in Table

IX. The methods of testing specified where applicable shall be used. The sampling plan shall be as follows unless otherwise specified in the contract or solicitation.

Lot size (yards or units) Sample size

Under 800 2

801 – 22,000 5

22,001 and above 8

TABLE IX. Component testing

Component Characteristic Requirement

Paragraph

Test Method

All Exterior

Components

Shade Evaluation 3.1.3 1/

Upper Leather Range of Characteristics 3.2.1.1 MIL-PRF-3122

Oil Repellency 3.2.1.2 AATCC 118 2/

Water Repellency 3.2.1.3 AATCC 118 2/

Insole Thickness 3.2.2 ASTM D 1777 3/

Fungal resistance 3.2.2 ASTM D 3273

Wet Tensile 3.2.2 SATRA TM-2

Flexing Index 3.2.2 SATRA TM-3

Abrasion Resistance

Cellulose board

Non-Woven board

3.2.2

3.2.2

SATRA TM-14

SATRA TM-31

Transverse Tensile-Dry 3.2.2 SATRA TM-80

Dimensional Stability 3.2.2 SATRA TM-98

Peel Strength 3.2.2 SATRA TM-101

TABLE IX. Component testing - Continued

Laminated

Cloth

Martindale Abrasion Fabric

Only, Dry

3.2.3.1.1.1

ASTM D 4966 4/

Bursting Strength, Fabric only 3.2.3.1.1.1 ASTM D 3787

Bacterial Resistance

Staphylococcus Aureus

Pseudomonas Aeruginosa

Corynebacterium Xerosis

3.2.3.1.1.1

AATCC 100 & ATCC- 6538

AATCC 100 & ATCC-9027

AATCC 100 & ATCC-373

Hydrostatic Resistance (psi)

(Liner cloth)

Initial

At seam

After synthetic perspiration

After diesel fuel oil

ASTM D 751 5/

ASTM D 751 6/

ASTM D 751 7/ 8/ 9/

ASTM D 751 10/ 9/

Laminated

Cloth

Continued

Water Permeability/

Resistance

(Liner cloth)

Initial

At seam

After synthetic perspiration

After diesel fuel oil

AATCC 127 11/

AATCC 127 12/ 11/

AATCC 127 13/ 8/ 9/ 11/

AATCC 127 14/ 9/ 11/

Abrasive Durability

Back / Leather Side

ASTM D 3886 & AATCC

127 15/ 11/

Moisture Vapor Transmission

Rate (MVTR) (g/m2/24hrs)

B method

BW method

ASTM E 96 16/

ASTM E 96 17/

Flex Durability

Gelbo (cycles to leak)

Wet ( Hours to leak)

ASTM F 392 and AATCC

127 18/ 11/

ASTM F 392 and AATCC

127 19/ 11/

Toxicity 3.2.3.1.1.1.1 4.4.2.1.1

Two-Layer

Quarter

Side Panels

Fabric Content, Count, Yarn

Size

3.2.5 NA

Water repellency 3.2.5 AATCC-22

Pull Tab 3.2.6

Box Toe Initial Collapsing load (N) 3.2.7 SATRA TM-83

Resilience(%) 3.2.7 SATRA TM-83 20/

Moisture Resistance (%) 3.2.7 SATRA TM-83 21/

Area Shape Retention 3.2.7 SATRA TM-83

Counters Initial Collapsing load (N) 3.2.8 SATRA TM-83

Resilience(%) 3.2.8 SATRA TM-83 20/

Moisture Resistance (%) 3.2.8 SATRA TM-83 21/

Area Shape Retention 3.2.8 SATRA TM-83

Shank Hardness 3.2.9 ASTM E-18

Eyelets Range of Characteristics 3.2.10 NA

Speed Lace Range of Characteristics 3.2.11 NA

Quarter Foam Range of Characteristics 3.2.12 NA

Laces Range of Characteristics 3.2.13 A-A-55093

Cushion

Midsole

Polyether

Polyurethane

Density (gm/cc) 3.3.2 ASTM D 297

Hardness (shore A) 3.3.2 ASTM D 2240 22/

Tensile strength (kgf/cm sq) 3.3.2 ASTM D 3574 23/

Elongation (Percent) 3.3.2 ASTM D 3574 23/

Tear Strength, Die T (kg/cm) 3.3.2 ASTM D 3574 23/

Volume Swell (Percent) w/ASTM Oil #3 (at 24 hrs)

3.3.2

ASTM D 471 23/ 24/

Compression Set (Percent) 3.3.2 SATRA TM-64 25/

Ross Flex (1 inch X 6 inch) at

-5 °C (Percent) 150,000 cycles

3.3.2

ASTM D 1052 26/ 27/ 28/

Rubber

Outsole

NBS abrasion (minimum) 3.3.3.1 ASTM D 1630

Hardness (shore A) 3.3.3.1 ASTM D 2240

Stitch Tear Dry Fuel B

3.3.3.1

ASTM D 4786

ASTM D 4786 29/

Die C tear strength, pounds

(minimum)

3.3.3.1 ASTM D 624

Ross flex, Oil #3 3.3.3.1 ASTM D 1052 30/

Volume swell, Fuel B (46 hrs) 3.3.3.1 ASTM D 471 31/

Non-marking 3.3.3.1 SATRA TM 223

Tensile 3.3.3.1 ASTM D 412

Elongation 3.3.3.1 ASTM D 412

Cold Flex (-23 °C) ASTM D 1052 28/

Transitional Hardness, change after 2 hrs at -23°C 3.3.3.1

ASTM D 2240

Slip Index (cold/ice) 3.3.3.1 SATRA TM 144

Removable

Insert

Density 3.3.6 ASTM D 3574

Foam Hardness 3.3.6 ASTM D 2240

Tensile strength 3.3.6 ASTM D 3574

Compression set @ 25%, percent

3.3.6 ASTM D 3574 32/

Compression set @ 50%, percent

3.3.6 ASTM D 3574 32/

Insole Foam Density 3.3.7 ASTM D3574

Tensile Strength 3.3.7 ASTM D3574

Compression set

At 50%, 23°C

At 50%, 70°C

3.3.7

ASTM D3574 D

ASTM D3574 D

Resilence/Ball Rebound 3.3.7 ASTM D3574 H

1/ The color of the components shall be Desert Sand, matching that of the standard sample (see 3.3) when tested in accordance with AATCC Evaluation Procedure 9 option A with sources simulating artificial daylight D75 illuminant with a color temperature of 7500 (+ 200)°K, illumination of 100 (+

20) foot candles and shall be a good match to the standard sample under incandescent lamplight at

2856 (+ 200)°K as specified in Section 3.1.3 of this Purchase Description.

2/ AATCC TM 118, Table 1- Standard Test Liquids (Hydrocarbons) shall be replaced with a

Water/Isopropyl Alcohol mixture as shown in Table X.

TABLE X. Replacement Table – AATCC 118

Test Liquid Ratio

Grade Water Isopropyl

0 100 0

1 90 10

2 80 20

3 70 30

4 60 40

5 50 50

6 40 60

7 30 70

8 20 80

9 10 90

10 0 100

3/ A thickness gauge of the dead-weight type equipped with a dial graduated to read directly to

0.001 inches shall be used. The presser foot shall be circular, with a diameter of 1.129 (± 0.001) inches and with moving parts weighted to apply a total load of 0.60 (± 0.03) pounds per square inch (psi) to the specimen. The anvil shall be not less than 1.129 inches in diameter. The presser foot and anvil surface shall be paned to within 0.001 inches and shall be parallel to each other to within 0.001 inches.

4/ Martindale Tester; Pressure applied: 12 kPa; visually examine specimens after each 3200 cycles;

abradant changed after each 3200 cycles. Use Option 1 for evaluation; no hole appears.

5/ Test five (5) samples in accordance with ASTM D 751 Procedure A1 with the face (foot side) of the liner cloth in contact with the water.

6/ Test five (5) samples containing sealed seams in accordance with ASTM D751 Procedure A1 with the face (foot side) of the liner cloth in contact with the water and the seam centrally located in the circular orifice.

7/ Test five (5) samples, four inch by four inch (4” x 4”), cut from the laminate material and exposed to contamination; synthetic perspiration (Footnote 8). Contaminate prior to leak testing by dispensing 2 milliliters (ml) of perspiration solution on both sides of the sample (see

Footnote 9 for contamination procedure.) Determine hydrostatic resistance in accordance with

ASTM D751 Procedure A1 with the face (foot side) of the liner cloth in contact with the water.

8/ Synthetic perspiration shall be prepared in a 500-milliliter (ml) glass beaker by combining 3.0 grams sodium chloride, 1.0 gram trypticase soy broth powder, 1.0 gram normal propyl propionate, and 0.5 grams of liquid lecithin. Add 500 milliliters (mls) of distilled water, add a magnetic stirring bar and cover beaker. Place the beaker on a combination hot plate/ magnetic stirring apparatus. While stirring, heat the solution to 50 degrees C until all ingredients are dissolved. Then, while stirring, cool solution to 35 degrees C.

9/ Dispense contaminate on to the center of a glass plate (8 inches by 8 inches by 0.25 inch thick.).

Sample shall be placed face down on the plate and an additional contaminate dispensed on the backside. Place a second glass plate on the sample. Next, position a 4-pound weight on the center of the second glass plate. After 16 hours, remove the sample (do not rinse) and test immediately.

10/ Test five (5) samples, four inches by four inches (4” x 4”), cut from the laminate material and exposed to diesel fuel as follows: Contaminate prior to leak testing by dispensing 3 drops of diesel fuel onto both sides of the sample (see Footnote 6 for contamination procedure.)

Determine hydrostatic resistance in accordance with ASTM D751 Procedure A1 with the face

(foot side) of the liner cloth in contact with the water.

11/ Test five (5) samples in accordance with AATCC 127 with face/ foot side towards water. Suter test conditions shall be 0.7 psi (50 cm), for 5 minutes. Any observed water droplets in test area constitutes a failure.

12/ Test five (5) samples containing sealed seams in accordance with AATCC 127 with the face

(foot side) of the liner cloth in contact with the water and the seam centrally located in the circular orifice. Follow Suter test conditions and inspection as specified in Footnote 11.

13/ Test five (5) samples, eight inches by eight inches (8” x 8”), cut from the laminate material and exposed to synthetic perspiration (Footnote 8.) Contaminate prior to leak testing by dispensing

2 milliliters (mls) of perspiration solution on both sides of the sample (see Footnote 9 for contamination procedure.) Determine water resistance in accordance with AATCC 127 with the face (foot side) of the liner cloth in contact with the water. Follow Suter test conditions and inspection specified in Footnote 11.

14/ Oil Test five (5) samples, eight inches by eight inches (8” x 8”), cut from the laminate material and exposed to diesel fuel as follows: Contaminate prior to leak testing by dispensing 3 drops of diesel fuel onto both sides of the sample (see Footnote 9 for contamination procedure.)

Determine water resistance in accordance with AATCC 127 with the face (foot side) of the liner cloth in contact with the water. Follow Suter test conditions and inspection as specified in

Footnote 11.

15/ Test back side of five (5) laminate samples in accordance with ASTM D3886. Non-contact pin diaphragm approved for use to decrease variability. The test is to be run for the specified number of cycles prior to testing for leakage. Leakage shall be determined in accordance with

AATCC 127. Follow Suter test conditions and inspection as specified in Footnote 11.

16/ Determine MVTR in accordance with ASTM E96 method B with the back side of the test cloth shall face the water. The free stream air velocity shall be 550 (± 50) feet per minute (fpm) as measured 2 inches above the specimen. The airflow shall be measured at least 2 inches from any other surface. The test shall be run for 24 hours and weight measurements shall be taken at only the start and completion of the test. At the start of the 24-hour test period, the air gap between the water surface and the specimen shall be 0.75 (± 0.06) inches.

17/ Determine MVTR in accordance with ASTM E 96 method BW with the backside of the test cloth facing the water. The free stream air velocity shall be 550 (± 50) feet per minute (fpm) as measured 2 inches above the specimen. The airflow shall be measured at least 2 inches from any other surface. The specimen shall be sealed to the cup in any manner that prevents wicking or leaking of water out of the cup. The test shall be run for 2 hours and weight measurements shall be taken at only, the start and completion of the test.

18/ Test one (1) sample, 8 inch by 12 inch, shall be conditioned and flexed in accordance with

ASTM F392 except specimen shall not be aged, the short edges shall not be heat sealed or otherwise joined and the specimen shall be flexed for the specified number of cycles. Two (2)

6 inch by 8 inch specimens, shall be cut from the flexed sample and tested for leakage in accordance with AATCC 127. Follow Suter test conditions and inspection as specified in

Footnote 11.

19/ One (1) sample, 14 inches by full width, shall be selected from a sample unit and tested for leakage after the required number of hours of continuous agitation. The specimen shall be agitated using the “normal,” cycle in an automatic home laundering machine except that the washing machine shall be capable of continuous agitation. The water level shall be maintained at 16 (± 0.5) gallons, and the water temperature shall be 32 (± 9 degrees C). Additional fabric shall be added to the specimen to create a load weight of 2 (± 0.2) pounds. Upon completion of the continuous agitation the specimen is to be air dried and then tested for leakage in accordance with AATCC 127. Follow Suter test conditions and inspection as specified in

Footnote 11.

20/ Resilience is percentage retention of initial collapsing load after ten collapses.

21/ Moisture resistance is percentage retention of initial dry collapsing load after 1 hour immersion.

22/ Thickness of test sample used shall equal 12.7 millimeters (mm) (0.5 inch) from test slabs.

23/ Thickness of test sample used shall equal 12.7 millimeters (mm) (0.5 inch) from test slabs or

6.0 millimeters (mm) from actual cushioned midsoles. Actual cushioned midsoles shall be used for verification testing only. However, all test reports used for conformance purposes and submitted to the Government shall use test slabs.

24/ Test conducted after 24 hours at Room Temperature with ASTM test slabs.

25/ Thickness of test sample used shall equal 12.7 millimeters (mm) (0.5 inch) from test slabs or

19.0 millimeters (mm) from actual cushioned midsoles. Actual cushioned midsoles shall be used for verification testing only. However, all test reports used for conformance purposes and submitted to the Government shall use test slabs.

26/ Test method modified to include 2 millimeter (mm) insole board glued onto the specimen and conducted at – 5 degrees C. Samples shall be pre-conditioned for 2 hrs at -5 degrees C

27/ Thickness of test sample used shall equal 6.4 millimeters (mm) (0.25 inch) from test slabs or

6.0 millimeters (mm) from actual cushioned midsoles. Actual cushioned midsoles shall be used for verification testing only. However, all test reports used for conformance purposes and submitted to the Government shall use test slabs.

28/ Test conducted after 2 hours conditioning

29/ Test conducted after 46 hours in Fuel B at Room Temperature

30/ One (1) drop of oil per 6,000 flexes.

31/ Test conducted after 46 hours at Room Temperature with ASTM test slabs

32/ Parts measured at 77 degrees F.

4.4.2.1 Bacterial resistance (lining fabric). Testing shall be conducted on a single ply of fabric.

The following specificity will be followed within the AATCC 100 test method for interlaboratory correlation. An untreated control fabric will be run for each determination that closely approximates the characteristics of the treated fabric without anti-microbial technology.

a. Grow test organisms in 1x nutrient broth (NB) overnight.

b. Determine Optical Density at 600 nanometers (OD600). Dilute with 1x NB to OD600 = 1, yielding a cell concentration of approximately 108 CFU/ml.

c. Wash 1 milliliter (ml) cells twice with 1milliliter (ml) 0.125x (diluted 1:8) NB medium with

0.15 % (w/v) Triton X-100. Recheck OD600.

d. Dilute cells 1:10 with 0.125x NB/ 0.15 % (w/v) Triton X-100 to target concentration of 1-2x107

CFU/ml. Serially dilute inoculum 10-fold for plating to determine concentration.

e. For a single determination for each organism, two incubation times, 0, and 24 hr, shall be examined. Cut each specimen into 48 millimeter (mm) circles in triplicate for each time point.

Do not sterilize; plating will be done on medium selective for the test organisms (see step k).

f. Inoculate each single swatch specimen in a petri dish with 0.2 milliliter (ml) (or the amount that a single swatch specimen can absorb within 10 - 20 minutes) to avoid puddling of inoculum not in contact with the sample.

g. Place the rolled swatch into a sterile 100 Milliliter (ml) bottle and cap. Swatch rolled with tweezers when inserting into the bottle will minimize contaminating the neck with the organisms on the swatch (purpose is to reduce or prevent inoculum not in contact with the swatch).

h. Process 0 hour contact time immediately. Incubate 24 hour inoculated swatch at 37 (+2)°C.

i. For swatch inoculation volume of 0.2 milliliter (ml), neutralize with 20 milliliter (ml) Dey-

Engley (D-E) broth (dilution is 10-2). Shake 1 minute. Add D-E to each of the replicate before doing 10-fold dilutions. For other inoculation volumes, adjust D-E volume appropriately for a

10-2 dilution. Shake bottles 1 minute.

j. Dilute D-E solution 10-fold in PBS buffer (final dilutions 10-3, 10-4, 10-5).

k. Spread plate 0.1 milliliter (ml) 10-3, 10-4, 10-5 dilutions in duplicate on selective media. These dilutions are usually suitable to obtain valid counts.

i. S. aureus – BBL Mannitol salts agar (cat # 211407, BD Diagnostic Systems)

ii. P. aeruginosa – Centrimide agar (cat # 7222, Neogen Corp)

l. Incubate plates overnight at 37 (+2)°C.

m. Report the microbial concentrations (CFU/ml) for each swatch at both contact times. Use average triplicate concentration for 0 and 24 hour contact times to calculate percent reduction for the treated swatches and untreated control. Also report starting inoculum concentration;

minimum valid concentration is 5x106 CFU/ml. If the treated swatches show 90% reduction, the test should be rerun to verify. Untreated control would not be expected to exhibit reduction.

4.4.2.1.1 Toxicity test. When required (see 6.2), an acute dermal irritation study and a skin sensitization study shall be conducted on laboratory animals. When the results of these studies indicate the finished lining fabric is not a sensitizer or irritant, a Repeat Insult Patch Test shall be performed in accordance with the Modified Draize Procedure. (See 2.3). If the toxicity requirement

(see 3.2.3.1.1.1.1) can be demonstrated with historical use data, toxicity testing may not be required

(see 6.2).

4.4.2.1.2 All antimicrobial treatments used to process the lining fabric shall be identified and accompanied by the appropriate Material Safety Data Sheet (MSDS) information. The use of chemicals recognized by the Environmental Protection Agency (EPA) as known human carcinogens is prohibited.

4.4.3 End item visual examination. The end item shall be examined for the defects listed in

Table XI. The lot size shall be expressed in units of boots. The boots shall be examined with cushion insert inserted.