DRAFT MIL-DTL-32758A 12.17.24.pdf

NOTE: This draft, dated 17 December 2024, prepared by United States Marine Corps, has not been approved and is subject to modification. DO NOT USE PRIOR TO APPROVAL. (Project 8430-2025-001)

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

Distribution Statement A. Approved for public release: distribution is unlimited.

INCH-POUND

MIL-DTL-32758A

DRAFT

SUPERSEDING

MIL-DTL-32758

17 November 2023

DETAIL SPECIFICATION

BOOT, COMBAT, TROPICAL

This specification is approved for use by all Departments and Agencies of the Department of Defense.

1. SCOPE

1.1 Scope. This specification covers a tropical combat boot for use in both hot weather wet and dry environments.

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

1.2.1 Type.

Type I - Tropical combat boot

1.2.2 Class.

Class 1 - Coyote 498

1.2.3 Sizes and widths. The boots are sized using men’s boot sizes.

Sizes: 3 through 16 (whole and half sizes)

Widths: Narrow (B) Regular (D) Wide (EE) X-Wide (EEEE)

2. APPLICABLE DOCUMENTS

2.1 General. The documents listed in this section are specified in sections 3 and 4 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 and 4 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.

COMMERCIAL ITEM DESCRIPTIONS

A-A-52071 - Tape, Textile, Cotton, General Purpose

A-A-55093 - Laces, Footwear mailto:USMC_STDZ@usmc.mil

DRAFT 17 DECEMBER 2024

A-A-55296 - Cloth, Twill, Cotton, 10.0 Ounces

A-A-59826 - Thread, Nylon

DEPARTMENT OF DEFENSE SPECIFICATIONS

MIL-PRF-3122 - Leather, Cattlehide, for Footwear Uppers and Gusset, Chrome Tanned, Fatliquored

MIL-DTL-5038 - Tape, Textile and Webbing, Textile, Reinforcing, Nylon

MIL-PRF-17337 - Webbing, Textile, Woven, Nylon

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

MIL-DTL-32439 - Cloth, Duck, Textured Nylon

(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 of these documents are those cited in the solicitation or contract.

CODE OF FEDERAL REGULATIONS (CFR)

40 CFR - Protection of Environment

(Copies of this document are available online at www.ecfr.gov.)

U.S. ARMY DEVELOPMENTAL COMMAND - SOLDIER CENTER DRAWINGS

2-1-1635 - Speed Lace Assembly

(Copies of this drawing are available from the U.S. Army, DEVCOM, Soldier Center, ATTN: FCDD-SCD-PEI, 10 General Greene Avenue, Natick, MA 01760-5019.)

2.3 Non-Government 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 - Visual Assessment of Color Difference of Textiles

(Copies of this document are available online at www.aatcc.org.)

AMERICAN SOCIETY FOR QUALITY (ASQ)

ASQ/ANSI Z1.4 - Sampling Procedures and Tables for Inspection by 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 https://quicksearch.dla.mil/ http://www.ecfr.gov/ https://www.ecfr.gov/ http://www.aatcc.org/ https://asq.org/

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

Using Ross Flexing Apparatus

ASTM D1424 - Standard Test Method for Tearing Strength of Fabrics by Falling-

Pendulum (Elmendorf-Type) Apparatus

ASTM D1777 - Standard Test Method for Thickness of Textile Materials

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

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

ASTM D3776/D3776M - Standard Test Methods for Mass Per Unit Area (Weight) of Fabric

ASTM D3787 - Standard Test Method for Bursting Strength of Textiles–Constant-Rate-of-Traverse (CRT) Ball Burst Test

ASTM D4786 - Standard Test Method for Stitch Tear Strength, Single Hole

ASTM D4964 - Standard Test Method for Tension and Elongation of Elastic Fabrics

(Constant-Rate-of-Extension Type Tensile Testing Machine)

ASTM D4966 - Standard Test Method for Abrasion Resistance of Textile Fabrics

(Martindale Abrasion Tester Method)

ASTM D5034 - Standard Test Method for Breaking Strength and Elongation of Textile

Fabrics (Grab Test)

ASTM D5963 - Standard Test Method for Rubber Property–Abrasion Resistance (Rotary

Drum Abrader)

ASTM D6797 - Standard Test Method for Bursting Strength of Fabrics Constant-Rate-of-Extension (CRE) Ball Burst Test

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

INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO)

ISO 17235 - Leather – Physical and Mechanical Tests – Determination of Softness

(Copies of this document are available online at www.iso.org.)

ORGANISATION FOR ECONOMIC CO-OPERATION AND DEVELOPMENT (OECD)

OECD Guidelines for the Testing of Chemicals, Section 4, Test No. 404

- Acute Dermal Irritation/Corrosion

OECD Guidelines for the Testing of Chemicals, Section 4, Test No. 406

- Skin Sensitisation

(Copies of these documents are available online at www.oecd-ilibrary.org.)

SATRA TECHNOLOGY

SATRA TM1 - Thickness of Leather and Insole Materials

SATRA TM64 - Compression Set - Constant Stress Method http://www.astm.org/ http://www.iso.org/ http://www.oecd-ilibrary.org/

SATRA TM83 - Measurement of the Area Shape Retention and Collapsing Load of Formed Box

Toe (Toe Puff) and Counter (Stiffener) Materials

SATRA TM223 - Floor Marking by Solings or Top Pieces

(Copies of these documents are available online at www.satra.com.)

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 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 be comparable to (see 6.5.2) a swatch of cattlehide leather for shade and sueded flesh appearance. Unless otherwise specified in this specification (see 3.5 and 3.14), 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 Design. The boot is Coyote 498 in color and has a collar covered with a nylon cloth. The boot has a partial speed lace system consisting of eyelets, holes, or webbing loops below the comfort notch with the remainder being speed loops. The boot is lasted with a textile insole and contains a removable cushion insert. The exterior leather areas are flesh-side out leather with perforations for drainage/ventilation (see 3.5.8) located in the upper of each boot. The quarter is nylon duck; the backstay, pull tab, and ankle reinforcements are nylon webbing.

3.4.1 Expected service life. The expected service life of the boot is 12 months of normal wear. Extended wear on asphalt or other abrasive surfaces may reduce service life.

3.5 Materials.

3.5.1 Upper leather. With the exceptions specified in 3.5.1.1, the leather shall be flesh out drum dyed

Coyote 498 cattle hide with color penetrating throughout the thickness of the hide so that the chrome tannage is not visible. The leather softness shall be 2.5 millimeters to 3.5 millimeters using a 35-millimeter aperture and shall meet requirements when tested as specified in 4.4.3. The leather for the vamps, outside counter pockets, and inside eyelet stays shall conform to MIL-PRF-3122, type I, class 4, treatment A and treatment B. The leather for the outside eyelet stays shall conform to MIL-PRF-3122, type II, treatment A.

3.5.1.1 Upper leather exceptions. The following exceptions to MIL-PRF-3122 shall be applicable for the upper leathers:

a. The flesh surface shall be suede.

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 inside and outside eyelet stays shall not apply.

e. The thickness for the cut parts shall be as specified in 3.14.1.1.

file://///peraton.com/fs/Programs/ALEXVA/ALX_Projects/Systech/Specs%20&%20Stds%20Processing%20-%20Elaine/Marine%20Corps%20Specs%20&%20Stds/MC040%20(Tropical%20Boot)%20-%20KR/www.satra.com

3.5.2 Insole. The Strobel lasting board shall be made with a non-woven water-repellent polyester material.

The board shall meet the requirements of table I when tested as specified in 4.4.3.

TABLE I. Strobel board performance requirements.

Characteristics Physical Requirements

Weight, ounces per square yard (±10%) 15.5

Thickness, millimeters (minimum) 1.5

Tensile strength, psi (minimum)

Machine direction 180

Cross-machine direction 180

Bursting strength, psi (minimum) 400

Elongation, percent (minimum)

Machine direction 20

Cross-machine direction 10

3.5.3 Counters. The thermoplastic counter shall conform to the performance requirements of table II when tested as specified in 4.4.3. The counter shall fit the last used and shall fill the counter pocket area.

TABLE II. Thermoplastic performance requirements.

Initial collapsing load (N) >130

Resilience, percent (minimum) 25

Moisture resistance, percent (minimum) 80

Area shape retention, percent (minimum)

Initial 85

10th collapse 60

Thickness (inches) 0.068±10%

3.5.4 Box toe. A thermoplastic box toe shall be used and shall conform to the performance requirements of table II. The box toes shall be skived 3/8±1/8 inch wide at the breast. Inspection shall be in accordance with 4.4.2, and testing shall be as specified in 4.4.3.

3.5.5 Upper construction. The upper shall be constructed with the materials and features below.

3.5.5.1 Cloth. The cloth for the quarters of the boot shall conform to MIL-DTL-32439, type III, class 1, style A. The air permeability requirement shall not apply for the cloth for both boots. The material shall be fungal resistant, water resistant, non-wicking, and backed with lining material to eliminate water absorption and moisture wicking. The color shall be Coyote 498 when compared to the standard sample (see 3.2). The cloth for the quarters may be treated with a non-fray finish to facilitate cutting and handling. The cloth for the collar cover may be flame-combined to a 0.05±0.008-inch thick layer of polyester foam having a density of 1.70±0.05 pounds per cubic foot. Inspection shall be in accordance with 4.4.2 and testing shall be as specified in 4.4.3. Narrow goods, including back strap, ankle reinforcements, and binding tape, may be the same nylon fabric construction as that used in the gusset and quarter side panels. Nylon, as defined in the applicable type, class, and style, may be used in the tongue area to improve durability and comfort as long as there is no degradation in performance.

3.5.5.2 Gusset fabric. The fabric for the gusset shall be a 100-percent polyester spacer knit. The face fabric shall be a jersey knit, and the back fabric shall be mesh. The mesh shall be a raschel warp-knit mesh with fillet stitch. The color shall be Coyote 498 when compared to the standard sample (see 3.2). The gusset fabric may be treated with water repellency. The gusset fabric shall conform to table III. Inspection shall be in accordance with

4.4.2, and testing shall be as specified in 4.4.3.

TABLE III. Gusset fabric performance requirements.

Weight, ounce per square yard 12.5±10%

Thickness, inches 0.116±10%

Wales (width) 25±3

Courses (length) 52±5

Breaking strength (pounds) (minimum)

Wales (width of fabric) 75

Courses (length of fabric) 75

Tear strength (pounds) (minimum)

Wales (width of fabric) 10

Courses (length of fabric) 8

Elongation (percent) (minimum)

Wales (width of fabric) 125

Courses (length of fabric) 90

3.5.5.3 Fabric liner for cushioned insert and inside counter pocket. The cloth for the fabric top cover on the cushioned inserts and the inside counter pocket shall conform to the requirements in table IV. Inspection shall be in accordance with 4.4.2 and testing shall be as specified in 4.4.3.

TABLE IV. Fabric liner performance requirements.

Martindale abrasion, dry (153,600 cycles) (minimum) 9,600

Bursting strength, pounds (minimum) 125

3.5.5.4 Back seam tape. The tape shall conform to A-A-52071, type I, class 3, 1/2±1/32 inch wide. As an alternate, the tape shall conform to MIL-PRF-5038, type III, class 1, 1/2±1/32 inch wide. Back seam tape shall not extend over the comfort collar. Inspection shall be in accordance with 4.4.2, and testing shall be as specified in

4.4.3.

3.5.5.5 Vamp lining. The cloth for the vamp lining and optional inside counter pocket shall be a textile knit laminate conforming to the requirements in table IV. As an alternative vamp lining, cotton twill conforming to class 2 of A-A-55296 with an added durable water repellent finish may be used, so long as the end item meets the requirements stated in table IV. Inspection shall be in accordance with 4.4.2, and testing shall be as specified in

4.4.3.

3.5.5.6 Binding tape. The tape for binding the top edge of the gusset shall be nylon conforming to

MIL-PRF-5038 type III, class 1 or 2, 3/4 inch. The color shall be Coyote 498 matching (see 6.5.2) that of the standard sample (see 3.2).

3.5.5.7 Backstay and ankle reinforcement tape. The backstay tape shall be cut from 1-inch wide nylon webbing. The ankle reinforcing tape width shall be between 2 and 3 inches of nylon webbing, starting at the corner of the heel counterpart and back seam tape, crossing over the ankle bone when worn. The webbing shall conform to

MIL-PRF-17337, class 1 or class 2. The color shall be Coyote 498 (see 6.5.2) when compared to the standard sample (see 3.2).

3.5.5.8 Pull tab. The boot shall contain a pull tab loop. The nylon tape at the back seam shall be extended to create a pull tab with a circumference of 3 to 3-3/4 inches when completed. The stitching of the pull tab shall be below the padding of the comfort collar. The top of the pull tab shall be even with the top of the collar

(+0, -1/4 inch). The webbing shall be tested in accordance with 4.4.3.

3.5.5.9 Comfort collar. The foam rubber for the padded collar shall be 1/4-inch thick latex foam having a density of 6.7±2 pounds per cubic foot. One side of foam shall be covered with a cotton scrim cloth.

3.5.5.10 Comfort notch. The comfort notch shall be a V-shaped cut out between the eyelets and the speed loops that allows for both plantar- and dorsi-flexion of the foot.

3.5.6 Shank. The boot shall include a fiberglass shank bonded to the insole, outsole, or both. The fiberglass shank (glass and resin area), when cured, shall be 3/4±1/4 inch in width. The rear end of the shank shall be placed

2-1/4±1/4 inches in front of the rear end of the boot, the forward end of the shank shall not extend into the ball area, and the shank shall be oriented along the center line of the boot. The shank lengths shall conform to the schedule as specified in table V.

TABLE V. Shank lengths.

Last Size (All Widths) Shank Length (Inches)

Minimum Maximum

Last sizes 3 through 4.5 2-3/4 3-1/8

Last sizes 5 through 8 3-1/2 4

Last sizes 8.5 through 11.5 4-1/8 4-3/8

Last sizes 12 through 13.5 4-1/2 4-3/4

Last sizes 14 through 16 4-7/8 5-1/4

3.5.7 Eyelets and speed lacing loops. The size AA eyelets, and the speed lacing loops produced in accordance with Drawing 2-1-1635, shall be brass or aluminum with a durable coated finish in Coyote 498 (see 6.5.2), which is durable enough to be expected to remain on the eyelets and speed laces for the life of the item (see 3.4.1). The eyelets and speed laces shall be expected to remain permanently fixed to the upper, and shall not rust, tarnish, or otherwise change the subdued finish color for the life of the item when exposed to standard operational environments in tropical climates. Adjustments shall be made such that all sizes allow users to easily utilize the speed lace system and proper closure of the item is achieved. The number of speed laces and eyelets shall be in accordance with table VI and shall be equally spaced on the eyelet stays to allow proper lacing and cinching of the boot for ease of donning and doffing, and shall have the same alignment between both rows. The bottom eyelets shall be placed in a position on the foot such that they do not cause hot spots, blisters, or other irritation. The distance between eyelets and speed loops shall be not greater than 1-3/8 inches, center to center, from one another.

As an alternative, webbing for the lower lacing portion and at least three sets of speed lacing eyes for the upper lacing portion may be used.

TABLE VI. Speed loops and eyelets.

Boot Sizes Below Comfort Notch Above Comfort Notch

Number of Eyelets Number of Speed Loops

3 to 12 3 3 to 4

12.5 to 16 3 4 to 5

3.5.8 Drainage. The boot shall have a means of allowing drainage and ventilation but not allowing sand to get into the boot, on both the medial and lateral sides of the leather vamp, behind the ball area of the foot, and the natural flex line of the boot. Either perforated holes (see 3.5.8.1) or metal grommets with an imbedded screen

(see 3.5.8.2) may be used. A combination of both methods may be used with the approval of the design by the contracting agency.

3.5.8.1 Drainage and ventilation holes. If perforations are used, there shall be no less than eight perforations on each side for sizes 3 through 7.5 and no less than ten perforations on each side for sizes 8 through 16. There shall be no more than fifteen perforations on each side in any size. The diameter of the perforations shall be not less than

0.04 inch and equally spaced from one another on each side using a design pattern of two to three rows and the necessary number of columns. The number of perforations in each row shall not differ from all other rows by more than one. The drainage perforations may be backed by a non-metallic screen mesh or knit laminate material with a sieve size of not greater than 0.032 inch (0.8 millimeter). The mesh or knit laminate, if used, shall be held in place with adhesive, stitching, or both around the perimeter of the perforations. Internal components of the boot, to include adhesives, shall not interfere with the proper drainage from the perforation holes. The lowest row of drainage perforations shall be no further than 0.375+0.125 inch from the midsole. Perforations, and any backing materials, shall not present hot spots or other sources of discomfort to the wearer, nor shall they cause any degradation to the durability of the boot. Inspection shall be in accordance with 4.4.2, and testing shall be as specified in 4.4.3.

3.5.8.2 Drainage and ventilation grommets. Grommets, if used, shall be permanently fixed to the boots for the expected life of the item (see 3.4.1) and shall have a subdued finish to blend with the color of the leather upper. The grommets shall incorporate a permanently-embedded screen mesh with a sieve size not greater than 0.032 inch

(0.8 millimeter). The placement of the grommets shall be in the inner arch of the boot at a location that allows the greatest possible drainage of water from the boot. Internal components of the boot shall not interfere with the proper drainage and ventilation through the eyelets and shall not create hot spots to the wearer. Eyelets shall be placed at the same location relative to the solid midsole on all boots (with variation according to boot size). Inspection shall be in accordance with 4.4.2, and testing shall be as specified in 4.4.3.

3.6 Laces. The laces shall conform to type III, class 1 of A-A-55093. The color of the laces shall be

Coyote 498 when compared to the standard sample (see 3.2). The length of the laces shall be a minimum of

66 inches for all sizes. Inspection shall be in accordance with 4.4.2, and testing shall be as specified in 4.4.3.

3.7 Soling system requirements.

3.7.1 Cup sole. If a cup-type soling system is used, the sole of the boot shall be a single unit cup-type outsole.

The method of attachment shall be adhesive or sewing, or a combination of both, using industry standard methods.

The cup-style outsole shall have a tread pattern that is self-cleaning while allowing for the incorporation of design improvements to improve traction and durability. The sole shall be attached with a cement construction, sole stitch construction, or both. The outsole shall incorporate a shank (see 3.5.6) to provide stiffness and strength to the outsole longitudinally. Outsoles may include a layer or material to provide additional protection against puncture.

Although not lab tested, the outsole color should be similar to the color of the nylon fabric (see 3.5.5.7). See 6.7.1 for a sole design that has demonstrated the ability to meet the soling requirements.

3.7.1.1 Cup sole bonding. The outsole shall be bonded to the upper using stitching, adhesive, or a combination of stitching and adhesive. The bond shall be continuous with no gaps or open spaces and the outsole shall be bonded such that it cannot be separated from the upper by hand. The cup sole rubber compound shall meet the requirements of 3.7.3.

3.7.2 Direct attach sole. The boots shall be made on military last model “FMT U3813-1 Military”, or equal, designed for direct attach based on Government approval. When using the FMT U3813-1 model, the numerical size of the boot shall correspond with one more than the numerical size of the last used to produce the boot (i.e., a size

11R 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 outsole mold shall produce an outsole with a tread pattern that is self-cleaning while allowing for the incorporation of design improvements to improve traction and durability. The outsole shall meet the requirements of 3.7.3, and the cushion midsole shall meet the requirements of 3.7.4. See 6.7.1 for a sole design that has demonstrated the ability to meet the soling requirements.

3.7.3 Rubber outsole compound requirements. The requirements for the rubber outsole compounds are based on testing done on slabs and not actual soles. The requirements shall be as specified in table VII when tested in accordance with 4.4.3.

TABLE VII. Rubber outsole compound requirements.

Characteristics Requirement

Abrasion (minimum) 150

Hardness (shore A) 70-80

Stitch tear, psi (minimum)

Dry 180

Fuel B 50

Die C tear strength, pounds (minimum) 308

Ross flex, IRM 903, percent (maximum)

50,000 flexes 250

Volume swell percent (maximum)

Fuel A (24 hours) 12

Non-marking Pass

Tensile, pounds (minimum) 2,100

Elongation, percent (minimum) 400

3.7.4 Cushioned midsole. The cushioned midsole used when incorporating a direct attach sole shall meet the requirements of table VIII.

TABLE VIII. Cushioned midsole physical requirements.

Characteristics Minimum Maximum

Density, grams per cubic centimeter 0.40 0.60

Hardness (shore A) 50 75

Tensile strength, kilogram-force per square centimeter 25 --

Elongation, percent 250 --

Tear strength, kilograms per centimeter

Die T 3.7 --

Volume swell, percent w/IRM 903 (at 24 hours) -- 10

Compression set, percent -- 20

Ross flex, percent at cycles (1 inch x 6 inches) at -5 °C -- 900 at 150,000

3.7.5 Direct attach sole bond strength. The direct attach sole shall exhibit a bond strength (at the ball) of not less than 130 pounds, on average. Not less than one sample in a lot (see 4.4.4) may measure below 130 pounds, and no specimen shall measure below 110 pounds.

3.8 Thread, nylon. The thread shall be nylon, conforming to A-A-59826, class A or class B, type I, Tex size 68-70 (Government size E); type II, Tex size 70-76 (Government size E); or type III, Tex size 70-75

(Government size E). The color of the thread shall be Coyote 498. Colorfastness requirements shall not apply.

Inspection shall be in accordance with 4.4.2, and testing shall be as specified in 4.4.3.

3.9 Removable cushion insert. The removable cushion insert for the boot shall be a low-density polyether-polyurethane heel cup support made of a polyurethane system, and lined (black or tan in color). The cushioned insert shall provide comfort and shall be made to optimize the fit of the item, using the last the item was made on. The cushion insert should take a minimal compression set, even after extensive wear or material conditioning. The cushion insert and its lining shall be resistant to fungal growth, shall provide good frictional characteristics, and shall not be susceptible to hydrolysis. Characteristics shall be equal to or better than the cushioned insert in currently fielded hot weather boots.

3.10 Vamp design. The vamp design shall allow for the leather vamp to extend up the gusset to approximately the second eyelet of the boot.

3.11 Boot height. The height of the boot shall be between 8.5 and 9.0 inches for a size 10R boot from the feather line to the top of the boot at its tallest point. The height shall be graded up and down between sizes and widths appropriately to minimize the interference with the calf musculature. The overall height of the boot shall include the collar.

3.12 Boot weight. When tested as specified in 4.4.4, the weight of the boot shall not exceed 1.8 pounds

(816 grams) when dry, with an objective weight of 1.5 pounds (680 grams), for a finished men’s boot made on a men’s size 10R last. The weight of the boot when saturated with water (see 3.18) should be minimized through materials and construction technique. Materials that reduce wet or dry weight with any detrimental effect on durability, comfort, breathability, or any other aspect of overall performance are not in the best interest of the United

States military and should not be used.

3.13 Lasts and molds. Last sizes 3 through 16 cover the boot size range of 3 through 16 in this specification.

3.13.1 Direct attach soling construction lasts and molds. The boots shall be lasted and molded on commercial lasts designed for direct attach. The numerical size of the boot shall correspond with one more than the numerical sizes, and in the appropriate width, of the last used to produce the boot. The direct attach process (either injection molding or open pouring) shall utilize a separate cushion midsole mold to produce appropriate widths for each whole and half size.

3.14 Construction.

3.14.1 Uppers.

3.14.1.1 Cutting leather uppers. The leather parts shall conform to the thickness requirements specified in table IX. All leather for boot components, with the exception of the inside eyelet stays, shall be cut so as to be used flesh side out. Vamps shall be examined as specified in 4.4.3. Outside eyelet stays shall not be split down parts.

Skiving of leather upper parts is permitted.

TABLE IX. Thickness of leather uppers (ounces).

Characteristics If Not Split Down For Split Down Parts

Minimum Maximum Minimum Maximum

Vamp 4 5 -- --

Outside counter pocket 4 5 -- --

Outside eyelet stays 3 4 -- --

Inside eyelet stays 3 4 3-1/2 4

3.14.1.2 Cutting fabric upper parts. The quarters shall be cut in the bias direction such that the collar seam is not parallel with either the warp or fill direction. The collar cover shall be cut in the bias direction.

3.14.2 Insole construction. The boot shall be made with a Strobel construction in which the bottom construction of the boot shall include a non-woven textile insole that is stitched 360 degrees around the bottom of the upper. The textile insole should match the last bottom gauge.

3.14.3 Marking, permanent identification. With the exception of Product Demonstration Models, boots shall be permanently marked on the inside of the boot in the shaft or gusset area with the appropriate size and width, the contract number, and the company or brand name. Alternatively, the marking may be applied to the inside of the upper portion of the tongue of the boot. The marking may be in the form of a label that will last for the expected life of the boot, and it shall not reduce footwear functionality. The boot shall contain a manufacturing tracking lot number and a born date. Embossing of a company or brand name or application of a company branded label on the exterior of the boot shall not be permitted. Unit packs shall include the National Stock Number (NSN) and

Universal Product Code barcodes as specified in the contract (see 6.2). Each symbol shall be human and scanner readable. As an alternate, a sewn in label may be utilized.

The United States Marine Corps “Eagle, Globe, and Anchor” (EGA) logo shall be embossed on the outside quarter

(heel area) on both the left and right boot. The EGA shall be permanently marked anchor forward for both the left and right boot. The design detail of the EGA shall be clearly visible from a distance of 3 feet. Men’s sizes

3 through 7-1/2 shall use a small-sized die; men’s sizes 8 through 10 shall use a medium-sized die; and men’s sizes

10-1/2 through 16 shall use a large-sized die. A recommended source of the EGA die is provided in 6.7.2.

3.15 Assembly.

3.15.1 Boot finishing. No top finish or treatment shall be applied.

3.15.2 Pairing, lacing, and instruction tag. The boots shall be paired. Each pair of boots shall consist of a left and a right boot of the same size. Measurements shall not vary between boots of a pair by more than 1/4 inch for any measurement. The shade of all leather parts in a pair of boots shall be a close match. A lace shall be inserted through the top speed lace loop of the outside quarter of each boot, and the two laces for each pair shall be tied firmly together. One instruction tag shall be attached to each pair of boots by inserting a lace through the hole in the instruction tag. If not incorporated into the instruction tag, a barcode tag (see 3.16) shall also be attached to each finished pair of boots.

3.15.2.1 Instruction tag. An instruction tag shall be attached to each pair of finished boots. The tags shall be printed on tag stock. The tag shall be legible but shall not exceed 4-1/2 inches in any dimension, to include all pertinent instructions for the user. The tag may be folded or otherwise oriented to accommodate all necessary information. A punch hole shall be made in the tag for insertion of the lace. The barcode (see 3.16) may be incorporated into the instruction tag.

3.16 Barcode tag. The barcode tag shall conform to MIL-DTL-32075, type VIII, class 17. The barcoding element shall be a 13-digit NSN. The barcode type shall be a medium to high code density. The barcode tag shall be located so that it is completely visible on the item when it is packaged as specified and in a manner that causes no damage to the item. As an option, a hang tag identifying the features of the boot is permitted.

3.17 Toxicity. When specified (see 6.2), boots shall be tested for the presence of health hazards. The finished boot shall not present a health hazard and shall show compatibility with prolonged, direct skin contact, as specified in 40 CFR §798.2250, Dermal Toxicity, and 40 CFR §798.4100, Dermal Sensitization (see 4.7). Chemicals recognized by the Environmental Protection Agency as human carcinogens shall not be present in the finished boot.

3.18 Saturated weight. The saturated weight of the boot shall not exceed 116 percent of the dry weight when tested in accordance with 4.5.1.

3.19 Workmanship. The finished boots shall conform to the quality of product established by this specification. The occurrence of defects shall not exceed the contractor’s own quality assurance standards and the quality assurance standards defined by the contract (see 6.2).

4. VERIFICATION

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

a. First article inspection (see 4.2).

b. Conformance inspection (see 4.3).

4.1.1 Inspection conditions. Unless otherwise specified in this specification or in applicable contract or procurements documents (see 6.2), all inspections shall be performed in accordance with the test conditions specified in this specification and reference documents.

4.2 First article inspection. The first article (see 3.1.1 and 6.3) shall be inspected for compliance with design, workmanship, and dimensions. In addition, the first article shall include verification of compliance to the visual inspection (see 4.4.2), component testing (see 4.4.3), end item testing (see 4.4.4), and shade (see 4.6). The presence of excessive defects in excess of the acceptance quality limit (AQL), as defined by contract or purchase order

(see 6.2), or failure to pass any test shall be cause for rejection of the first article. The sample size shall be specified in the procurement document (see 6.2). The sample unit shall be one pair of boots and the lot size shall be expressed in pairs of boots.

4.3 Conformance inspection. Conformance inspection shall include the examination of 4.4.1 and 4.4.2 and the tests of 4.4.3 and 4.4.4, as applicable. Sampling for inspection shall be performed in accordance with

ASQ/ANSI Z1.4 and with AQLs as specified in the contract or order (see 6.2).

4.4 Component, material, and end-item 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 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 End-item visual examination. The end items shall be examined for the defects listed in table X. The lot size shall be expressed in units of boots. The removable cushion inserts shall be inserted in the boots. For the pairing examination, and when determining possible differences in outsole thickness, the pair shall be examined together. During the inspection for the defects listed, the minor defects or 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 the Government personnel reserve the right to establish and impose lot rejection criteria when either the frequency or severity of 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.

TABLE X. Defects.

Examine Defect Classification

Major Minor

Construction and workmanship

(general) affixed

Any component missing or not specified type 101

Any component misplaced or not as specified

Seriously affecting serviceability 102

Not seriously affecting serviceability 201

Vamp stitched more than 5/32 inch from edge at throat 103

Vamp stitched more than 3/32 inch from edge at throat but not greater than 5/32 inch from edge at throat

Seriously affecting serviceability 104

Not seriously affecting serviceability 202

Vamp throat or wings not skived

Seriously affecting serviceability 105

Not seriously affecting serviceability 203

Quality of leather Thickness more than 1/2 ounce less than the minimum specified 106

Thickness less than the specified minimum, not exceeding 1/2 ounce less 204

Thickness more than maximum specified (see 3.14.1.1) 107

Off-stretch cut

Seriously affecting serviceability 108

Not seriously affecting serviceability 205

Slaughter cut

Seriously affecting serviceability 109

Not seriously affecting serviceability 206

Leather Any spot or stain more than 1 inch in its longest dimension 110

Any hole that is not part of the boot design, cut, or tear 111

Missing end or pick, thick or thin areas 207

Overall uncleanliness 208

Crease or hard crease 209

Slubs, knots, slugs, or gout 210

Shade bar, streaks or uneven dying 211

Not flesh side out or cattle hide nubuck 112

Leather deeply snuffed fiber structure damaged 212

Grub or tick damage, scratches, brands, or bony leather 113

Fat wrinkles or veins 213

Stretchy vamp 214

Rough fiber on flesh side 215

Excessive roughing or scouring 216

Water repellent treatment not uniform 217

Adhesive bleeding greater than 1/8 inch on leather 218

TABLE X. Defects - Continued.

Examine Defect Examine

Major Minor

Outsole Excessive adhesive 219

Defects in tread or edge area not otherwise specified 220

Incomplete or incorrect bonding of outsole to upper (i.e., not securely attached)

Seriously affecting serviceability 114

Not seriously affecting serviceability 221

Outsole not aligned with boot edges 115

Incorrect tread pattern 116

Tread lugs not properly formed 222

Thickness not as specified 223

Edge irregular, affecting appearance 224

Any malformation 225

Insole Not correct size for the boot 226

Textile insole is not securely stitched to upper 117

Any protruding lasting stitch 118

Polyurethane bleeding through

Seriously affecting serviceability 119

Not seriously affecting serviceability 227

Wrong foot/pairing issue 228

Missing 229

Laces Frayed 230

Cut 231

Ends not properly finished 232

Labels and marking

Label missing, incorrect, or illegible 120

Required information missing from the label 121

Missing, incomplete, incorrect, not applied in the specified manner, misplaced, illegible, or not specified size or not readable by scanner

Causes damage to end item 122

Barcode tag Barcode omitted or not readable by scanner 123

Human-readable interpretation omitted or illegible 234

Barcode type not as specified 235

Code density not as specified 236

Packaging Not packaged in accordance with section 5 of this specification 237

TABLE X. Defects - Continued.

Examine Defect Examine

Major Minor

Pairing Different size boots 124

Two left or two right boots in a pair 125

Shade differences between boots 238

Boots from different lots 239

Dimensional differences between boots (except factors below): 240

More than 1/4 inch 126

More than 1/8 inch but less than 1/4 inch 241

Variation of more than 1/4 inch in height of pair 127

Difference in outsole thickness between left/right boot

More than 3/32 inch 128

More than 1/16 inch but less than 3/32 inch 242

Construction and workmanship

Any damage not otherwise specified affecting appearance 243

Design not as specified 129

Color not as specified; finish streaky, chipped, flaky, or shaggy 244

Nappy on upper 245

Any raw edges not stained to match upper leather 130

Cut, tear, hole, repair, or factory damage

Seriously affecting serviceability 131

Not seriously affecting serviceability 246

Wrinkled or bunched area at the back seam

Seriously affecting serviceability 132

Not seriously affecting serviceability 247

Component or assembly omitted or misplaced, operation omitted or not properly performed (unless otherwise classified herein)

Seriously affecting serviceability 133

Not seriously affecting serviceability 248

Any component, assembly, or design present creating “hot spots” 134

Bottom of boot Any component missing, sized wrong, malformed, or not specified type 135

Poor heel seat, side, or toe lasting

Seriously affecting serviceability 136

Not seriously affecting serviceability 249

Upper part of boot Upper damaged 137

Uppers not firmly pulled down to last

Seriously affecting serviceability 138

Not seriously affecting serviceability 250

TABLE X. Defects - Continued.

Examine Defect Examine

Major Minor

Gusset polyester -mesh spacer fabric

Mended or weak spot 139

Fabric oriented incorrectly or mesh-side out 140

Abrasion, spot, stain, or discoloration

Seriously affecting serviceability 141

Not seriously affecting serviceability 251

Binding Omitted 142

Nylon quarter Mended or weak spot 143

Two or more yarns missing 144

Quarter not cut on the bias 145

Abrasion, spot, stain, or discoloration

Seriously affecting serviceability 146

Not seriously affecting serviceability 252

Webbing (ankle reinforcement)

Not firmly and tightly woven, edges frayed or scalloped 147

Not properly placed 148

Incorrect width 149

Seams and stitching (upper)

Open seam not repaired

Seriously affecting serviceability 150

Not seriously affecting serviceability 253

Quarter panel and gusset fabric not caught in second row of inside eyelet stay stitching

One or more run-off stitches 151

Loose tension resulting in a loosely secured seam

Seriously affecting serviceability 152

Not seriously affecting serviceability 255

Tight tension resulting in puckering or cutting of leather

Seriously affecting serviceability 153

Not seriously affecting serviceability 256

Row of stitching with less than eight stitches per inch but not less than six stitches per inch

Any row of stitching with less than six stitches per inch 154

More than 10 stitches per inch

Seriously affecting serviceability 155

Not seriously affecting serviceability 258

Gauge of stitching not as specified or irregular

Seriously affecting serviceability 156

Not seriously affecting serviceability 259

TABLE X. Defects - Continued.

Examine Defect Examine

Major Minor

Seams and stitching (upper)

(continued)

Stitching omitted where required

Seriously affecting serviceability 157

Not seriously affecting serviceability 260

Thread ends not trimmed throughout boot

Seriously affecting serviceability 158

Not seriously affecting serviceability 261

Needle holes or needle chew

Seriously affecting serviceability 159

Not seriously affecting serviceability 262

Sand hole (i.e., tongue not properly caught in at throat) 263

Vamp or counter pocket stitching at outsole junction

One or more rows of defective stitching not repaired 160

Repaired, but first stitch more than 1/4 inch from outsole junction 161

Repaired with one stitch in lieu of two or more stitches 264

Box toe Misshapen, collapsed 265

Counters Rolled or curled counter 162

Misshapen or collapsed 163

Eyelets/speed laces

Number of eyelets/speed lacer not as specified 164

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

Seriously affecting serviceability 165

Not seriously affecting serviceability 266

Eyelets/speed lacers not properly spaced within the row 166

Misalignment between the rows to an extent interfering with proper lacing 167

Any eyelet/speed lacer not securely clinched 168

Any eyelet/speed lace malformed or damaged 169

Removable cushion inserts

Missing, wrong size or width 267

Perforated holes Components omitted

Seriously affecting serviceability 170

Not seriously affecting serviceability 268

Incorrect number of holes

Seriously affecting serviceability 171

Not seriously affecting serviceability 269

Incorrect placement of holes 270

Incorrect number of rows and columns of holes 271

Mesh or laminate not secured with adhesive or stitching 172

TABLE X. Defects - Continued.

Examine Defect Examine

Major Minor

Pull tabs Components omitted 173

Incorrect size 174

Incorrect location

Seriously affecting serviceability 175

Not seriously affecting serviceability 272

Comfort notch placement

Incorrect placement

Seriously affecting serviceability 176

Not seriously affecting serviceability 273

4.4.3 Component testing. The components shall be tested for the characteristics listed in table XI. The methods of testing specified where applicable shall be used. 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

800 or less 2

801 through 22,000 5

22,001 and above 8

TABLE XI. Component tests.

Component Characteristic Requirement Paragraph Test Method

Upper leather Physical characteristics 3.5.1 MIL-PRF-3122

Shade evaluation 1/

Softness ISO 17235 2/

Insole Weight 3.5.2 and table I ASTM D3776/D3776M, option C

Thickness ASTM D1777 3/

Tensile strength ASTM D5034

Bursting strength ASTM D6797

Elongation, percent (min) ASTM D5034

Box toe and heel counters Initial collapsing load 3.5.3, table II, and 3.5.4 SATRA TM83

Resilience SATRA TM83 4/

Moisture resistance SATRA TM83 5/

Area shape retention SATRA TM83

Thickness SATRA TM1

TABLE XI. Component tests - Continued.

Component Characteristic Requirement Paragraph Test Method

Nylon duck fabric Physical characteristics 3.5.5.1 MIL-DTL-32439

Shade evaluation 1/

Gusset fabric Shade evaluation 3.5.5.2 and table III 1/

Weight ASTM D3776/D3776M, option C

Thickness ASTM D1777 3/

Wales ASTM D3787

Courses ASTM D3787

Tear strength ASTM D1424

Breaking strength ASTM D5034

Elongation, percent ASTM D4964

Fabric liner and vamp lining

Martindale abrasion 3.5.5.3, 3.5.5.5 and table IV

ASTM D4966 6/

Dry bursting strength ASTM D6797

Back seam tape As specified in

A-A-52071

3.5.5.4 As specified in

A-A-52071

Binding tape Width 3.5.5.6 Visual 7/

Shade evaluation 1/

Backstay, ankle reinforcement tape and pull tab

Width 3.5.5.7 Visual 7/

Pull tab circumference 3.5.5.8 Visual 7/

Shade evaluation 3.5.5.7 1/

Collar foam Thickness 3.5.5.9 ASTM D1777 3/

Density 3.5.5.9 ASTM D3574, test A

Shanks Width 3.5.6 and table V Visual 7/

Length

Speed lace assembly Shade evaluation 3.5.7 1/

Eyelets Shade evaluation 3.5.7 1/

Laces Length

Properties as specified in

A-A-55093

3.6 Visual 7/

As specified in

A-A-55093

Outsole Sole design/pattern 3.7 Visual 1/

Shade evaluation

TABLE XI. Component tests - Continued.

Component Characteristic Requirement Paragraph Test Method

Outsole rubber compound Abrasion 3.7.3 and table VII ASTM D5963

Hardness (shore A) ASTM D2240 8/

Stitch tear (dry) ASTM D4786

Stitch tear (Fuel B) ASTM D4786 9/

Die C tear strength ASTM D624

Ross flex, IRM 903 ASTM D1052

Volume swell, Fuel A at

24 hours

ASTM D471

Non-marking SATRA TM223

Tensile ASTM D412

Elongation ASTM D412

Midsole Density 3.7.4 ASTM D3574

Hardness (shore A) ASTM D2240

Tensile strength ASTM D3574

Elongation, percent ASTM D3574

Tear strength, Die T ASTM D3574

Volume swell, w/IRM 903

(at 24 hours)

ASTM D471

Compression set SATRA TM64

Ross flex at cycles

(1 inch x 6 inches) at -5 °C

ASTM D1052

Thread, nylon Shade evaluation 3.8 1/

FOOTNOTES:

1/ The color of the component shall be Coyote 498 when compared to the standard sample (see 3.2) when tested in accordance with AATCC EP9, option C as described in 4.6 of this specification.

2/ Test conducted with a 35-millimeter aperture.

3/ A thickness gauge of the dead-weight type equipped with a dial graduated to read directly to 0.001 inch 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 pound 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 inch and shall be parallel to each other to within 0.001 inch.

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

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

6/ Martindale tester; pressure applied: 12 kilopascals; visually examine specimens after each 3200 cycles;

abradant changed after each 3200 cycles.

7/ Measured with a calibrated ruler/caliper.

8/ Thickness of test slab shall be as stated in the respective ASTM method.

9/ Test conducted after 46 hours in Fuel B (see ASTM D471) at room temperature. All testing for conformance purposes (see 6.2) shall use test slabs.

4.4.4 End item testing. The finished boot shall be tested for the characteristics listed in table XII. The sample unit for all tests shall be one boot. All test results should contain the individual values utilized in expressing the final result. For all tests, the sample size shall be five boots regardless of lot size and the lot shall be unacceptable if one or more sample units fail to meet any requirement specified.

TABLE XII. End item tests.

Characteristic Requirement Paragraph Test Method

Boot height 3.11 Visual 1/

Weight 3.12 2/

Saturated weight 3.18 4.5.1

Bond strength (direct attach sole) 3.7.5 4.5.2

FOOTNOTES:

1/ Measured with a calibrated ruler/caliper

2/ Weighed on a calibrated scale

4.5 Methods of test.

4.5.1 Saturated weight. The saturated weight testing for the boots shall be conducted according to the following procedure:

a. All boots shall have laces and any packaging material shall be removed before conditioning and measurements. Insoles in the boots when received shall be included in the boots during soak and final weighing.

b. Dry mass measurements:

(1) All boots shall be conditioned at 70±5 °F and 65±3 percent relative humidity (RH) for a minimum of

4 hours.

(2) Dry mass (Wd) of each conditioned boot undergoing evaluation shall be taken and recorded on the lab balance upon which weighing will occur (see note 1).

c. Boot…