MC-PD-23-01 ICW Boot.pdf

DISTRIBUTION STATEMENT A. Approved for public release. Distribution is unlimited.

INCH-POUND

MC/PD-23-01

15 December 2023

PURCHASE DESCRIPTION

BOOT, COMBAT, INTENSE COLD WEATHER

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 combat boot, black in color, for use in intense cold weather (- 20 to 20 ℉ [-29 to -7 ℃]) environments.

1.2 Classification. The boot will be available in one type in the following sizes and widths (see 6.1), as specified (see 6.2).

1.2.1 Sizes and widths. The boots use a men’s sizing system (see 6.8).

Size: - 3 through 15-1/2 (whole and half sizes) and 16

Width: - Narrow (N), Regular (D), Wide (EE), and Extra Wide (EEE)

2. APPLICABLE DOCUMENTS

2.1 General. The documents listed in this section are specified in sections 3 and 4 of this purchase description. This section does not include documents cited in other sections of this purchase description 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 and 4 of this purchase description, 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 noted in the solicitation or contract.

COMMERCIAL ITEM DESCRIPTION

A-A-55093 - Laces, Nylon

Comments, suggestions, or questions on this document should be addressed to Marine Corps Systems

Command, 2200 Lester Street, Quantico, VA 22134 ATTN: SEAL-SE-STDS or emailed to

USMC_STDZ@usmc.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at https://assist.dla.mil.

AMSC N/A FSC 8430

mailto:USMC_STDZ@usmc.mil

MC-PD-23-01

DEPARTMENT OF DEFENSE SPECIFICATIONS

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

Tanned, Fatliquored

(Copies of these documents are available online at https://quicksearch.dla.mil.)

2.2.2 Other Government documents, drawings, and publications. The following other

Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation or contract.

DRAWINGS

U.S. ARMY COMBAT CAPABILITIES DEVELOPMENT COMMAND SOLDIER CENTER

2-1-1635 - Speed Lace Assembly

(Copies of drawings are available from the U.S. Army Combat Capabilities Development

Command (CCDC), Soldier Center, ATTN: FCDD-SCD-PE 10 General Greene Avenue, Natick, MA 01760-5019)

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 these documents are those cited in the solicitation or contract.

AMERICAN ASSOCIATION OF TEXTILE CHEMISTS AND COLORISTS (AATCC)

AATCC EP9 - Evaluation Procedure for Visual Assessment of Color Difference of

Textiles

AATCC TM22 - Test Method for Water Repellency: Spray

(Copies of these documents are available online at https://www.aatcc.org.)

AMERICAN SOCIETY FOR QUALITY (ASQ)

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

(Copies of this document are available online at https://asq.org.)

ASTM INTERNATIONAL

ASTM D412 - Standard Test Methods for Vulcanized Rubber and Thermoplastic

Elastomers - Tension

ASTM D471 - Standard Test Method for Rubber Property - Effect of Liquids

ASTM D624 - Standard Test Method for Tear Strength of Conventional Vulcanized

Rubber and Thermoplastic Elastomers

ASTM D1052 - Standard Test Method for Measuring Rubber Deterioration - Cut

Growth Using Ross Flexing Apparatus

ASTM D1777 - Standard Test Method for Thickness of Textile Materials

ASTM D1814 - Standard Test Method for Thickness of Leather Units

ASTM D2208 - Standard Test Method for Breaking Strength of Leather by the Grab

Method https://quicksearch.dla.mil/ https://www.aatcc.org/ https://asq.org/

ASTM D2240 - Standard Test Method for Rubber Property - Durometer Hardness

ASTM F2913 - Standard Test Method for Measuring the Coefficient of Friction for

Evaluation of Slip Performance of Footwear and Test

Surfaces/Flooring Using a Whole Shoe Tester

ASTM F3426 - Standard Test Method for Measuring the Thermal Insulation of

Clothing Items Using Heated Manikin Body Forms

ASTM D3574 - Standard Test Methods for Flexible Cellular Materials - Slab, Bonded, and Molded Urethane Foams

ASTM D5963 - Standard Test Method for Rubber Property - Abrasion Resistance

(Rotary Drum Abrader)

(Copies of these documents are available online at https://www.astm.org.)

SATRA GLOBAL TEST METHODS

SATRA TM64 - Compression Set – constant stress method

SATRA TM83 - Measurement of the area shape retention and collapsing load of formed box toe (toe puff) and Counter (stiffener) materials

(Copies of these documents are available online at https://www.satra.com/test_methods.)

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 Inspections.

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

(see 6.3) in accordance with 4.2.

3.1.2 Conformance inspection. When specified (see 6.2), a sample shall be subjected to conformance inspection in accordance with 4.3.

3.2 Standard sample. The finished leather shall match a swatch of cattlehide leather for shade

(see 6.2) and smooth grain out appearance. The finished boot materials shall be equal to or better than the standard sample with respect to all characteristics for which the standard is referenced.

3.3 Recycled, recovered, environmentally preferable, or biobased materials. Recycled, recovered, environmentally preferable, or biobased materials should be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs.

3.4 Description. The boot will have a waterproof leather upper with nylon quarter panels, plain toe, partial speed lace closure system, and built-in insulation material. The soling construction will be direct attach, stitch down or cement.

3.4.1 Expected life. The expected life of the boot is twelve cumulative months of normal wear and the storage life shall be the same as that of the standard combat boot.

https://www.astm.org/ http://www.satra.com/test_methods.)

3.5 Materials.

3.5.1 Upper leather. The leather shall be full grain leather drum-dyed black with color penetrating throughout the thickness of the hide so that the chrome tannage is not visible. The leather for the vamps, eyelet stays, backstay and foxing shall conform to MIL-PRF-3122, Type I, Class 1, Treatment A and B. The leather for the top band and gusset shall conform to MIL-PRF-3122, Type II, Class 1, Treatment A. The thickness shall be as specified for the cut parts in table I. Alternatively, the eyelet stays may conform to MIL-PRF-3122, Type II, Class 1, Treatment A.

TABLE I. Thickness of leather uppers.

Part Thickness (ounces)

Minimum Maximum

Vamp 4-1/2 6

Foxing 4-1/2 6

Eyelet stay 2-1/2 4-1/2

Gusset 2-1/2 4-1/2

Collar 2 4-1/2

Backstay 4-1/2 6

3.5.2 Fabrics.

3.5.2.1 Quarter side panels. The fabric for the quarter side panels shall be 100 percent nylon 6,6 or equal; 2 by 2 basket weave, 1,000 denier in both warp and filling direction; weighing a minimum of 8.25 ounces per square yard. The material shall be water resistant and backed with a microporous polytetrafluorethylene film. Construction of the end item shall be such that the seam strength between the 1000-denier nylon and all other components may be reasonably expected to last the expected life of the item (see 3.4.1).

3.5.2.2 Waterproof laminate boot lining. The boot lining shall be constructed from pattern pieces cut from waterproof laminate material. The lining shall consist of a textile face layer, an insulated batting, a waterproof film, and a tricot knit cloth. The tricot knit cloth shall be laminated to the outside (furthest from the foot) of the waterproof film. The insulated batting shall be located on the foot facing side of the waterproof film. A face layer shall be sewn to the foot facing side of the insulated batting.

3.5.2.3 Face layer. The face layer shall consist of an abrasion resistant textile. If used, any antimicrobial technology shall be an EPA registered antimicrobial. The finished lining fabric shall not present a health hazard. Chemicals recognized by the Environmental Protection Agency (EPA) as human carcinogens shall not be used. The color of the face layer shall be grey, green, or black.

The requirements of this paragraph shall apply to all lining within the boot including the fabric top cover (face cloth) attached to the removable cushioned insert.

3.5.2.4 Insulated batting. The boot shall contain an insulated batting of performance insulation material located on the foot facing side of the waterproof film (see 3.5.2.5). The boot may contain material such that, in its completed configuration, the insulation shall not absorb water.

3.5.2.5 Waterproof film. The waterproof film shall be impervious to liquid water for the life of the boot and breathable.

3.5.2.6 Tricot knit. The tricot knit cloth shall be nylon, weighing a minimum of 1.0 ounce per square yard. The color of the tricot knit cloth shall be natural unless otherwise specified in the contract or solicitation.

3.6 Components.

3.6.1 Adhesive. The adhesive for laminating the layers together shall be such that the laminate cloth remains durable throughout the expected life of the boot. The adhesive shall create no adverse health hazards when used as intended.

3.6.2 Box toes. The boot shall contain a thermoplastic box toe conforming to the performance requirements of table II when tested as specified in 4.4.2.

3.6.3 Counters. The boot shall contain a thermoplastic heel counter conforming to the performance requirements of table II when tested as specified in 4.4.2. The counter shall conform to fit the last used and shall fill the counter pocket area.

TABLE II. Box toes and counters performance requirements.

Characteristics Requirement

Initial Collapsing Load (newtons) (minimum) 130

Resilience, percent (minimum) 25

Moisture Resistance, percent (minimum) 80

Area Shape Retention, percent (minimum)

Initial 85

10th collapse 60

3.6.4 Shank. The boot shall include a fiberglass shank bonded to the insole and/or midsole. The fiberglass shank (glass and resin area), when cured, shall be 3/4 (± 1/4) inch in width.

3.6.5 Speed lace assembly. The speed lace assembly shall be brass or aluminum, with a coated nylon finish in accordance with Drawing 2-1-1635. The speed lace loops shall be positioned above the comfort “V” notch on the eyestay. The color shall be black.

3.6.6 Eyelets. There shall be a minimum of five pairs of eyelets below the comfort “V” notch on the eyestay for all sizes. Eyelets shall be brass, with a coated nylon gloss finish. The color shall be black.

3.6.7 Removable cushion insert. Unless otherwise specified in the contract or solicitation (see

6.2), the removable cushion insert shall utilize an abrasion resistant fabric top cover, black in color. The removable cushion insert shall be a low-density polyurethane heel cup support made of a pure polyether polyurethane system, medium black in color, meeting the requirements listed in table III when tested as specified in 4.4.2. The total thickness of the insert shall be

0.180 (± 0.025) inch forward of the instep, and 0.250 (± 0.030) inch elsewhere. The cushion insert shall be mated by size to the correct size boot.

TABLE III. Removable cushion insert requirements.

Characteristics Requirement

Density, lb./cu. ft. 16-20

Foam Hardness, Shore 00 50-65

Tensile strength, psi (min) 82

Compression set at 25 percent, percent (max) 5

Compression set at 50 percent, percent (max) 5

3.6.8 Laces. The color of the laces shall be black. The length of the laces shall have length graduating up and down with size (see 6.9). The laces shall conform to Type III, Class 1 of A-A-

55093. Testing shall be as specified in 4.4.2.

3.7 Soling system requirements.

3.7.1 Soling construction and design. The soling shall be direct attach construction, stitch down construction or cement construction. The dimensions and characteristics of the cushion midsole shall be sufficient to meet all of the requirements listed within this document.

3.7.2 Midsole requirements. The boot shall contain a pure polyether polyurethane midsole. If the midsole is visible in the finished boot, the midsole shall be black in color. The requirements for the pure polyether polyurethane cushioned midsole are based on testing, in accordance with specified procedures, done on slabs and not actual midsoles. The requirements shall be as specified in table IV when tested in accordance with 4.4.2.

TABLE IV. Midsole polyether polyurethane requirements.

Characteristic Requirement

Density, grams per cubic centimeter 0.35-0.60

Hardness, shore A 40-75

Tensile strength, kilograms force per square centimeter (min.) 18

Elongation, percent (min.) 250

Tear Strength, Die T, kilograms per centimeter (min.) 3.7

Volume Swell, percent (max.), IRM 903 Oil at 24 hours. 10

Compression set, percent (max.) 20

Ross Flex (1-inch x 6-inch) at -5 °C, percent (max.) 150,000 cycles 900

3.7.3 Outersole.. The color of the rubber outersole, including any identification plug, shall be black.

3.7.3.1 Rubber outersole compound requirements. The requirements for the rubber outersole shall be as specified in table V when tested in accordance with 4.4.2.

TABLE V. Rubber outersole compound requirements.

Characteristics Requirements

DIN abrasion (maximum) 150

Hardness, shore A 52-67

Tear strength, die C, pounds. (minimum) 200

Tensile strength, pounds per square inch (minimum) 1,450

Elongation, percent (minimum) 450

Cold flex, -23 °C, percent (maximum) at 7,500 flexes 500

Transitional hardness (max. change)

After 2 hrs. at -40°C +15 point shore hardness

After 2 hrs. at -23°C +10 point shore hardness

Coefficient of friction, rough/ice (minimum) 0.20

NOTE: The requirements in table V for the rubber outersole are based on testing, in accordance with specified procedures, done on slabs and not actual soles.

3.8 Construction.

3.8.1 Cutting uppers. All of the upper parts may be split or shaved, provided they meet the requirements listed in 3.5.1. Skiving of upper leather parts is permitted.

3.8.2 Lasts and molds. The boots shall be made on commercial last model “FMT U3813-1

Military” or equal, based on Government approval.

3.9 Finished boot requirements.

3.9.1 Height. The height of the finished boot, measured upward on the outside from the top of the midsole to the top of boot shall be 8 to 10 inches on size 10R and shall graduate up and down between sizes and widths when tested as specified in 4.6.

3.9.2 Boot weight. The weight of a finished size 10R boot with cushion insert shall be less than or equal to 4.9 pounds per pair when tested as specified in 4.6.

3.9.3 Insulation. The finished boot shall have a minimum clo value of 1.2 when tested as specified in 4.6.

3.9.4 Finished sole bond strength. The bond achieved between the boot upper, cushion midsole, and outersole shall be resistant to any delamination for the life of the item.

3.9.4.1 Outersole to cushion midsole bond strength. Boots shall require bond strength testing between the midsole and outersole. The outersole to cushion midsole bond strength shall not be less than 100 pounds. Testing shall be performed on the end item as specified in 4.6.

3.9.4.2 Entire sole to upper. The bond strength between the midsole and the outersole shall not be less than 130 pounds. Testing shall be performed on the end item as specified in 4.6.

3.9.5 Leakage. The finished boots shall not exhibit any leakage when tested as specified in 4.6.

3.9.6 Marking, permanent identification. With the exception of product demonstration models

(PDMs), the Contractor shall permanently mark the correct American size and width, and the contract number (Example: 04-D-1234) on the inside quarter panel side 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. As an option, each boot may contain a sew-in label identifying the waterproof membrane utilized. Component and boot feature hang-tags may be attached to the boots. Embossing of a brand name is permitted. The unit packs shall include a Universal Product Code (UPC) symbol for each National Stock Number (NSN) as specified in the contract solicitation. Each symbol must be human and scanner readable.

3.9.6.1 Instruction/ and care and use label tag. The information tag and use and care label is to be tied to the finished boots or placed inside. The print size shall be 8 to 10 points, 1/8-inch

(± 1/32 inch). The information tag and use and care label shall be printed using the data specified on Figures 1 and 2.

3.9.6.2 Barcode tag. Each item shall be individually bar-coded. The bar-coding element shall be a 13-digit National Stock Number (NSN). The bar-code type shall be a medium to high density, and the tag shall be located so that it is completely visible on the item, and shall be attached in a way that causes no damage to the item.

3.10 Workmanship. The finished boots shall conform to the quality of product established by this purchase description. The occurrence of defects shall not exceed the contractor's own quality assurance standards and the acceptance quality limits (AQL) specified in the contract or order (see

6.2).

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 3.1.1 and 6.2) 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 examination of 4.4.1 and the tests of 4.4.3 through 4.4.2 as applicable. Sampling for inspection shall be performed in accordance with

ASQ/ANSI Z1.4 and with acceptance quality limits (AQLs) as specified in the contract and/or order, except where otherwise indicated.(see 6.2).

4.4 Component and material inspection.

4.4.1 In-process inspection. Inspection shall be made 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 VI in accordance with the specified test methods. Any component measurements of thickness, width, length or height not otherwise specified in table VI shall be tested using a calibrated measuring device, such as a ruler or caliper. Unless otherwise specified in the contract or solicitation

(see 6.2), the sampling plan shall be as follows:

Lot size (yards or units) Sample size

Under 800 2

801 – 22,000 5

22,001 and above 8

TABLE VI. Component tests.

Characteristic Requirement Paragraph Test Method

Upper Leather

Physical Characteristics 3.5.1 MIL-PRF-3122

Shade 3.5.1 AATCC EP9 1/

Thickness Table I ASTM D1814

Box Toe/Counters

Initial Collapsing Load 3.6.2/3.6.3 SATRA TM83

Resilience 3.6.2/3.6.3 SATRA TM83 3/

Moisture Resistance 3.6.2/3.6.3 SATRA TM83 4/

Area Shape Retention 3.6.2/3.6.3 SATRA TM83

Shank

Width 3.6.4 Visual 2/

Removable Cushion Insert

Thickness 3.6.7 Visual 5/

Density 3.6.7 ASTM D3574

Foam Hardness 3.6.7 ASTM D2240

Tensile strength 3.6.7 ASTM D3574

Compression set at 25 percent 3.6.7 ASTM D3574

Compression set at 50 percent 3.6.7 ASTM D3574

Laces

Length 3.6.8 Visual 5/

Polyether Polyurethane Cushion Midsole

Density 3.7.2 ASTM D3574

Hardness 3.7.2 ASTM D2240 5/

Tensile strength 3.7.2 ASTM D3574 6/

Elongation 3.7.2 ASTM D3574 6/

Tear strength, Die T 3.5.2 ASTM D3574 6/

Volume swell 3.5.2 ASTM D471 6/, 7/

Compression Set 3.5.2 SATRA TM64 8/

Ross flex (1x6 inch) at 5℃ 3.5.2 ASTM D1052 9/, 10/

TABLE VI. Component tests. Continued

Characteristic Requirement Paragraph Test Method

Outersole (rubber)

DIN abrasion 3.7.3 ASTM D5963

Hardness, Shore A 3.7.3 ASTM D2240

Tear Strength, Die C 3.7.3 ASTM D624

Tensile Strength 3.7.3 ASTM D412

Elongation 3.7.3 ASTM D412

Cold Flex, 7,500 flexes at -

23°C

3.7.3 ASTM D1052 11/

Transitional Hardness (2 hours at -40°C)

3.7.3 ASTM D2240 12/

Slip index 3.7.3 ASTM F2913

1/ The color and appearance of all exterior components shall match the standard sample (see

3.2) when viewed using the AATCC EP9 Option C (see 6.7), with sources simulating artificial daylight D75 illuminant with a color temperature of 7500K (± 200) illumination of

100 (±20) foot candles, and shall be a good match to the standard sample under incandescent A illuminant with a color temperature of 2856K (± 200).

2/ Measured with a calibrated ruler/caliper.

3/ Resilience is percentage retention of initial collapsing load after ten (10) collapses.

4/ Moisture resistance is percentage retention of initial dry collapsing load after one hour immersion.

5/ Thickness of test slab shall be 1/2-inch as stated in the respective ASTM method.

6/ Thickness of test sample used shall equal 12.7mm (1/2-inch) from test slabs or 6.0mm 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.

7/ Test conducted after 24 hours at room temperature with ASTM test slabs.

8/ Thickness of test sample used shall equal 12.7mm (1/2-inch) from test slabs or 19.0mm (3/4-inch) 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.

9/ Method modified to include Texon board (2mm) glued onto the specimens and conducted at -

5°C. Samples shall be preconditioned for 2 hours at -5°C.

10/ Thickness of test sample used shall equal 6.3mm (1/4-inch) from test slabs or 6.0mm 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.

11/ Test conducted after 2 hours conditioning

12/ Test specimens shall be at least 1/4-inch thick, sampled material shall be plied up to reach the desired thickness. Support the sampled material on a firm, hard surface at least 1/2-inch from edge. Record initial hardness test at RT (per ASTM D2240). Place sample in freezer at

-40°F (-40°C) for 2 hours. At 2 hours remove sample from freezer and record final hardness after a 2-second delay.

4.5 End item visual examination. The end items shall be examined for the defects listed in table VII below. The lot size shall be expressed in units of boots. The inspector shall check to see that cushion inserts are inserted in the boots. For the pairing examination, and when determining possible differences in outersole thickness, the pair shall be examined together. During the inspection for the defects listed within the "End item visual defect table", the departures from specification requirements listed in the table shall be observed and recorded. Presence of these departures shall not result in the rejection of the lot, but the plant quality assurance and Government personnel reserve the right to establish and impose lot rejection criteria when either the severity or the presence of these departures warrant. These additional rejection criteria may be invoked at any time during the life of the contract when the Government judges this action to be in their best interest. Defects of pairing shall be classified as a single defect.

NOTE: Appearance defects shall be scored only when the condition is plainly visible at a distance of

3-feet or more and it appreciably affects item appearance.

TABLE VII. End item visual defects.

Examine Defect Classification

Major Minor

Pairing Not properly mated; i.e., not right and left of same size 101

Variation in color or appearance 102

Variation of more than 1/4-inch in height of pair 103

Box toe malformed 104

Difference in outersole thickness between left and right boots

- more than 3/32-inch 105

- more than 1/16-inch but not more than 3/32-inch 201

Cleanness Any non-removable spot, stain, or foreign matter affecting appearance

Color / Finish Color not as specified 106

Design Not as specified 107

Construction and

Workmanship

(General)

Any cut, tear, hole, repair or damage 108

Any component or assembly omitted or misplaced, operation omitted, not properly performed.

Any component, assembly, or design creating “hot spots” to the wearer or damage to other clothing and equipment items.

Seams and

Stitching

(upper)

Open seam not repaired 111

Repair of open seam not as specified

On the outside of the boot 203

On the inside of the boot 112

NOTE: A seam shall be classified as open when one or more stitches joining a seam are broken or when two or more consecutive skipped or runoff stitches occur. On multiple stitched seams, a seam is considered open when either one or both sides of the seam are open.

TABLE VII. End item visual defects. Continued.

Examine Defect Classification

Major Minor

Seams and

Stitching (upper)

( Continued )

Tight tension resulting in puckering or cutting of the leather 113

Loose tension resulting in a loosely secured seam 114

Stitching omitted where required 115

Gauge of stitching irregular 116

Thread ends not trimmed throughout the boot 204

Needle holes or needle chew 117

Outersole and

Heel

Thickness not as specified 118

Any malformation, wrong size used 119

Eyelets/

Speedlaces

Number of eyelets/speed laces not as specified in each row 120

Not the same number of eyelets/ speed laces in each row 121

Eyelets/speed laces not properly spaced within the row or misalignment between the rows to an extent interfering with proper lacing

Any eyelet/speed lace not securely clinched 205

Any eyelet/speed lace malformed or damaged 206

Marking and instruction tag

Missing, incomplete, incorrect, not applied in the specific manner, misplaced, illegible, or not specified size

Cushion insole

(insert)

Missing, wrong size, or wrong side up 123

Lining Torn, loose or wrinkled 124

Upper Leather Not flesh side out 125

Leather deeply scuffed/damaged 126

Grub or tick damage, scratches, brands or boney leather 127

Fat wrinkles or veins 128

Thickness exceeds maximum or less than minimum specified 129

Gusset, tongue and collar leather

Flanky 130

Loose flesh, boney or boardy 131

4.6 End item testing. The finished boot shall be tested for the characteristics listed in table VIII. All test results shall contain the individual values utilized in expressing the final results. The sample size for each test shall be three boots. The number of determinations shall be as specified in the contract or solicitation.

The lot will not be acceptable if one or more samples fail any test.

TABLE VIII. End item testing.

Characteristics Requirement paragraph Test Method

Boot Design and Construction

Height 3.9.1 Visual 1/

Weight 3.9.2 Visual 2/

Insulation 3.9.3 ASTM F3426 3/

Bond Strength

Outersole to cushion midsole 3.9.4.1 4.5.1

Entire sole to upper 3.9.4.2 4.5.2

Leakage 3.9.5 4.5.3

1/ Measured with a calibrated ruler/caliper

2/ Measured with a calibrated scale

3/ Ambient temp 5 C, RH 50%, wind speed 0.4 m/s (0.9 mph).

4.7 Methods of inspection.

4.7.1 Bond strength test of outersole to cushion midsole.

4.7.1.1 Specimen. The specimen shall be a completed boot which has aged at least two days. The outersole shall be separated from the cushion-midsole, for a distance of approximately 2-1/2-inches from the toe end of the specimen. The separation may be aided by any suitable device or machine capable of withstanding the amount of force necessary to accomplish separation. After separation, the toe cap of the boot shall be crushed to facilitate mounting of the specimen in the tester. In event that the point of separation at the 2-1/2-inch point is not between the outersole and cushion midsole, that portion of the outersole remaining adhered to the cushion midsole shall be separated manually (with the aid of a knife or other instrument), so as to show separation between the outersole and cushion midsole.

4.7.1.2 Apparatus. A power-driven adhesion machine, or an approved testing device of equal performance, shall be used. The rate of travel of the power-actuated grip shall be 2-inches per minute.

The machine shall be operated with a device for maintaining maximum load indication.

4.7.1.3 Procedure. The separate toe ends of the specimen shall be clamped in the jaws of the machine.

The specimen shall extend outward at right angles to the direction of the application load. The machine shall be started, and the surface being tested shall be pulled apart to a distance of not more than 4-1/2-inches from the toe. The maximum value attained during separation shall be taken as the bond strength.

4.7.2 Bond strength test of entire soling system to upper.

4.7.2.1 Specimen. The specimen shall be a completed boot which has aged at least 2 days. The specimen shall be legibly marked on each side at two points (2 inches and 4 inches from the tip of the toe). The entire soling system shall then be separated from the upper to the 2-inch mark. The separation may be aided by any suitable device or machine capable of withstanding the amount of force necessary to accomplish separation. After separation to the two-inch mark is achieved, the toe cap of the boot shall be crushed to facilitate mounting of the specimen in the tester. In event that the point of separation at the 2-inch mark is not between the upper and the soling system, that portion of the soling system remaining adhered to the upper shall be separated manually (with the aid of a knife or other instrument), so as to show separation between leather and soling system. Care should be taken in order to be sure that the leather is not cut.

4.7.2.2 Apparatus and procedure. The apparatus for measuring soling system/upper separation shall be as described in test method ASTM D2208. The separated and crushed toe portion of the boot shall be gripped by one clamp in a manner such that the minimum effective jaw surface area applied shall be 1 inch by 1 inch. The jaw surface shall be centered approximately 1/2 inch to 1 inch from the tip of the toe. The other jaw surface shall hold the overlay portion of the separated upper, and it shall not be less than 1 inch by 2 inches, with the long dimensions perpendicular to the pull of the machine. The machine shall be set in operation and the separation continued at a speed of 10-inches per minute until the outersole is separated from the upper to a point past the mark 4-inches from the tip. The maximum value attained during separation shall be taken as the bond strength.

4.7.3 Boot leakage test. The boot leakage test shall be designed to indicate leakage by SATRA TM77

(modified as indicated below) while the boot is submerged. The minimum standard for passing this test is 100,000 flexes. Each boot shall be preconditioned by flexing in accordance with SATRA TM 77, dry with a foot form of steel shot for 100,000 flexes.

4.7.3.1 Apparatus. SATRA TM 184 Whole Shoe Flexing Apparatus or equal shall be modified to allow the end item to be submerged to the depth of the mid-point between the third and fourth eyelet in accordance with NFPA Standard 1971. The mechanism for flexing on any other apparatus shall be the same as the SATRA TM 184. The sides of the apparatus must be raised to alleviate splashing on the mechanism for flexing.

4.7.3.2 Procedure. Testing shall be in accordance with SATRA TM 77 at 140 (±10) flexes/minute and

35 degrees for each flex cycle. A modified SATRA TM 184 whole boot flex apparatus or equal must be used so that the water depth required can be achieved. The top of each item must be sealed appropriately so that the water splashing from the test does not enter through the top of the boot.

Absorbent blotting paper will be “balled up” and placed within the boot upper so that any water ingress through the top or upper can be determined. A change in the color between the top and the bottom sections of the absorbent blotting paper will indicate water ingress. The steel shot foot-form shall be removed for testing in water. The end item shall be checked at 100,000 cycles for leakage, as indicated by a color change in the absorbent blotting paper within the boot.

4.7.3.3 Method of inspection. End items will be evaluated in accordance with SATRA TM77, by checking for a change in color of the absorbent blotting paper that is “balled up” and placed within the boot upper. If water enters the top of the boot during the test, new absorbent blotting paper shall be inserted for the remainder of the test, unless the water has leaked to below the fourth eyelet. If water has definitely leaked through the top of the boot by splashing and reached to below the fourth eyelet, then the whole boot must be dried and the absorbent blotting paper replaced before the test is resumed.

Water ingress into the boot by way of wicking up the boot upper (outside) and down into the boot lining (inside) will not be considered an item failure. If it cannot be determined if the water has entered through the top or upper of the boot, a new boot shall be requested and subjected to the test.

5. PACKAGING

5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or order (see 6.2). When actual packaging of material is to be performed by DoD or in-house contractor personnel, these personnel need to contact the responsible packaging activity to ascertain requisite packaging requirements. Packaging requirements are maintained by the Inventory Control

Point’s packaging activities within the Military Department or Defense Agency, or within the military service’s system commands. Packaging data retrieval is available from the managing Military

Department’s or Defense Agency’s automated packaging files, CD- ROM products, or by contacting the responsible packaging activity.

6. NOTES

(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)

6.1 Intended use. The boots are intended for wear by military personnel of the Department of Defense

(DoD).

6.2 Acquisition requirements. Acquisition documents should specify the following:

a. Title, number and date of this purchase description.

b. Sizes and widths required (see 1.2).

c. The specific issue of individual documents referenced (see 2.2).

d. When first article inspection is required, (see 3.1, 4.2, 6.3).

e. Conformance inspection requirements and AQLs (see 3.1.2, 3.11 and 4.3).

f. Shade standard information (see 3.2, 3.7 and 6.7.2).

g. Inspection conditions (see 4.1).

h. Sampling plan (if applicable) (see 4.4.2).

i. Determinations required for end item testing if applicable (see 4.4.4).

j. Packaging (see 5.1).

6.3 First article. When a first article inspection is required (see 3.1), it will be inspected and approved under the appropriate provisions of FAR 52.209-4. The first article should be a preproduction sample.

The contracting officer should specify the appropriate type of first article and the number of units to be furnished. The contracting officer should include specific instructions in acquisition documents regarding arrangements for selection, inspection, and approval of the first article.

6.4 Standard sample. For access to samples and pattern drawings, address the contracting activity issuing the invitation for bids or request for proposal.

6.5 International standardization agreements. Certain provisions of this document are the subject of international standardization agreement as cited in NATO STANAG 2333. When amendment, revision, or cancellation of this document is proposed that will affect or violate the international agreement concerned, the preparing activity will take appropriate reconciliation action through international standardization channels including departmental standardization office, if required.

6.6 Equal item. Prior to use of an "or equal" item, the contractor shall submit the item with supporting data to the contracting officer for subsequent approval or disapproval by the responsible military agency.

6.7 Known sources. Boots with Vibram Sierra, Vibram Kletterlift or Contagrip Winter sole designs have met the requirements of this Purchase Description that are applicable to sole performance.

6.7 Visual shade matching. In 2017, option A of AATCC EP 9 was changed to option C. NOTE: In case of confusion, the viewing geometry should be, “The specimen plane and illumination source will be parallel to each other and aligned so that the light flux is incident at the center of the specimen plane, which is set at a 35 (± 5°) angle relative to the horizontal. The observer will view the specimens at a

90° angle, relative to the plane of the specimens.”

6.7.1 Use of D75 illumination source. The use of D75 illuminant with a color temperature of

7500±200K and illumination of 100±20 foot-candles in lieu of the specified D65 illuminant (see

Error! Reference source not found. note 1 to table VI) is permitted.

6.7.2 Shade criticality. Some items may be deemed “non-shade-critical” by the contracting agency and alternative shade standards or information regarding shade may be specified in the contract or order

(see 6.2). It is recommended that manufacturers refer to the contract or order to determine the criticality of the shade matching or alternate shade standards that are acceptable.

6.8 Boot sizing. While the boots are marked with men’s boot sizes, the boots are intended for wear by both male and female personnel. For wear by female personnel, it is recommended that 1-1/2 to 2 sizes be subtracted from the normal women’s boot size to determine a likely men’s size to be worn.. For example, a woman that normally wears a size 7 women’s boot should expect to wear a size 5 or 5-1/2 in a men’s boot. Because a number of factors can affect proper fit, it is recommended that all personnel

(regardless of gender) try on the boots with cold weather socks at the issue point, and a best fit be determined prior to issue.

6.9 Lace lengths. Laces should be of an adequate length to open the boot at the top to allow removal of the foot without the laces being pulled out of the speed lacing eyes. Suggested lace lengths are:

Boot size Lace length, inches (minimum)

2 through 6.5 72

7 through 11 87

11.5 through 16 97

6.10 Subject term (key word) listing.

Footwear

Insulated

Leather

INFORMATION TAG: BOOT, COMBAT, COLD WEATHER

The Intense Cold Weather Combat Boot (IWCB) has been designed to protect your feet from cold injury and frostbite in areas where moisture and cold are critical factors, and where the temperature ranges between 20°F and 60°F.

If your feet begin to get cold, secure all your garments and exercise the entire body by swinging the arms, stamping the feet, and rapid movement of the toes. If your feet remain cold, switch to Extreme Cold Weather Boots.

TRENCH FOOT AND FROSTBITE are serious cold injuries that can cause painful and permanent disability. These injuries can be prevented by proper care of your feet. No boot will keep your feet from freezing in cold/wet conditions if you remain motionless for several hours.

Wear the CWCB properly and DO NOT BECOME A COLD WEATHER CASUALTY.

FIGURE 1. Information Tag, Boot, Combat, Cold Weather.

Use and Care Instructions Cold Weather Combat Boot

1. Wear with: 1 pair of socks, wool, cushion sole.

2. Sizes. The boots are supplied in whole sizes 3 through 16, and in Regular and Wide widths. In some instances it may be necessary to select a slightly larger size than normally worn in order to allow for normal swelling of the feet and thick socks.

3. When pulling on the boot ensure the heel is seated firmly in place, then lace. Boots should fit snugly but not tightly. The heel should not slip up/down when walking and the foot should not slip side-to-side.

There should be approximately 1/2-inch additional length at toe.

4. Carry extra socks. Change socks often, at least once daily. Remove boots and dry feet as often as possible. Neglecting proper foot care can make you a casualty.

5. Your Combat Boots are designed to be easy to care for. To clean your Combat Boots, brush with stiff nylon bristle brush to clean and then use warm water. Do not use soap to clean your boots. If additional, more stringent cleaning is necessary, only water-soluble cleaning products should be used as oil- or alcohol-based cleaning products may damage your boots. Waterproofing is not required.

FIGURE 2. Use and Care instructions for Boot, Combat, Cold Weather.

CONCLUDING INFORMATION

Custodians: Preparing Activity:

Navy - MC Navy - MC