Attachment 0003 - MIL-DTL-32708A MittLiner 01.30.24.pdf

DETAIL SPECIFICATION

LINER, TRIGGER FINGER MITTEN, EXTREME COLD WEATHER

I INCH-POUND

MIL-DTL-32708A

30 January 2024

SUPERSEDING

MIL-DTL-32708

17 May 2022

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

1. SCOPE

1.1 Scope. This specification covers the extreme cold weather trigger finger mitten liner. This item is designed for wear in combination with a full mitten shell or a trigger finger mitten shell conforming to types I and II ofMIL-DTL-32707.

1.2 Classification. The mitten liner is of one type in the following sizes, as specified ( see 6.2).

1.2.1 Sizes.

Small

Medium

Large

Extra Large

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-59826 - Thread, Nylon

DEPARTMENT OF DEFENSE SPECIFICATIONS

MIL-C-3735

MIL-DTL-32075

- Cuffs, Knit, Wrist and Ankle, and Cloth, Knitted

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

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.

AMSCN/A

DISTRIBUTION STATEMENT A. Approved for public release: distribution is unlimited.

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FSC 8440

MIL-PRF-32567

MIL-DTL-32697

MIL-DTL-32699

MIL-DTL-32707

MIL-DTL-32708A

- Batting, Synthetic Fibers, Unquilted

- Cloth, Napped French Teny

- Cloth, 70 Denier Nylon Ripstop

- Mitten Shells, Full and Trigger Finger, Extreme Cold Weather

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

U.S. DEPARTMENT OF AGRICULTURE (USDA)

United States Standards for Grades of Wool

(Copies of this document are available online at https://www.ams.usda.gov.)

2.3 Non-Government publications. The following documents form a part ofthis 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)

AA TCC EPI - Gray Scale for Color Change

AA TCC EP9 - Visual Assessment of Color Difference of Textiles

AA TCC TM20 - Test Method for Fiber Analysis: Qualitative

AATCC TMI 18 - Oil Repellency: Hydrocarbon Resistance Test

AA TCC TM127 - Test Method for Water Resistance: Hydrostatic Pressure

AATCC TM135 - Dimensional Changes of Fabrics After Home Laundering

AA TCC TMI 50 - Dimensional Changes of Garments after Home Laundering

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

AMERICAN SOCIETY FOR QUALITY (ASQ)

ASQ/ANSI Zl.4 Sampling Procedures and Tables for Inspection by Attributes

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

ASTM INTERNATIONAL

ASTMD737

ASTMD1610

ASTMD1777

ASTMD1814

ASTMD1912

ASTMD2209

ASTMD2582

ASTMD2617

- Standard Test Method for Air Permeability of Textile Fabrics

- Standard Practice for Conditioning Leather and Leather Products for Testing

- Standard Test Method for Thickness of Textile Materials

- Standard Test Method for Measuring Thickness of Leather Units

- Standard Test Method for Cold-Crack Resistance of Upholstery Leather

- Standard Test Method for Tensile Strength of Leather

- Standard Test Method for Puncture-Propagation Tear Resistance of Plastic Film and Thin Sheeting

- Standard Test Method for Total Ash in Leather

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ASTMD2807

ASTMD2810

ASTMD2821

ASTMD3495

ASTMD3775

MIL-DTL-32708A

- Standard Test Method for Chromic Oxide in Leather (Perchloric Acid Oxidation)

- Standard Test Method for pH of Leather

- Standard Test Method for Measuring the Relative Stiffness of Leather by Means of a Torsional Wire Apparatus

- Standard Test Method for Hexane Extraction of Leather

- Standard Test Method for End (Warp) and Pick (Filling) Count of Woven Fabrics

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

ASTMD3884

ASTMD4705

ASTMD5052

ASTMD6076

ASTMD6182

ASTM D6193

ASTMD6797

ASTMD7255

- Standard Guide for Abrasion Resistance of Textile Fabrics (Rotary Platform Abrader Method)

- Standard Test Method for Stitch Tear of Leather, Double Hole

- Standard Test Method for Permeability of Leather to Water Vapor

- Standard Test Method for Shrinkage Temperature of Leather

- Standard Test Method for Flexibility and Adhesion of Finish on Leather

- Standard Practice for Stitches and Seams

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

- Standard Test Method for Abrasion Resistance of Leather (Rotary Platform, Abraser Method)

ASTM E96/E96M - Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials

ASTMF3426 - Standard Test Method for Measuring the Thermal Insulation of Clothing Items Using Heated Manikin Body Forms

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

INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO)

ISO 11640 - Leather - Tests for Colour Fastness - Colour Fastness to Cycles of To-and-Fro Rubbing

ISO 17075-2 - Leather - Chemical Determination of Chromium(VI) Content in Leather - Part 2:

Chromatographic Method

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

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 with4.2.

MIL-DTL-32708A

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

3.2 Standard sample. The finished trigger finger mitten liner and design shall match the standard sample (see 6.4) for design and all other characteristics or acceptance criteria for which a standard sample 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 trigger finger mitten liner is an inner mitten designed to be worn in combination with a mitten shell in extreme cold weather environments. The trigger finger design enables the wearer to move their first finger independently from the rest of the hand. The liner is part of a system that includes a waterproof full mitten shell, or trigger finger mitten shell conforming to type I and type II ofMIL-DTL-32707. The liner can be worn over a glove insert if desired. The mitten liner consists of the following: the outside shell is constructed from a water repellant 70 denier nylon ripstop conforming to 3.5. lMIL-DTL-32699 and a water repellent goatskin leather trigger finger conforming to 3.5.2. Grip material conforming to 3.5.3 is sewn at the fingertips on the outside of the nylon ripstop.

The mitten liner is insulated on the front and the back of the hand, and the outer thumb, with material conforming to 3.5.6. The inside cuff and trigger finger is lined with napped wool French terry conforming to 3.5.4; the lining used on the front of the hand, back of the hand, and the inner and outer thumb is a napped wool lay-in conforming to 3.5.5. Each liner has an attached cuff conforming to 3.5.7. The liner has a label to identify the item, its size, its use, and care.

3.4.1 Figures. Figures 1 and i are furnished for informational purposes only. To the extent an inconsistency exists between the written specification and the figures, the written specification shall govern.

3.5 Materials and components.

3.5.1 Liner shell material. The cloth used to construct the liner's outer shell shall be a water repellent urethane coated 70 denier nylon ripstop conforming to MIL-DTL-32699 (see 6.6.1). Unless otherwise specified (6.2), the color shall be Coyote 498 (see 6.5.2).

3.5.2 Leather. The leather used to construct the trigger finger shall be a 2.25- to 2.75-ounce full grain goatskin conforming to the requirements in table I when tested as specified in 4.4.3. The leather shall be chrome tanned, light fmish, fungicide and durable water repellent treated, backed by a waterproofmg layer. Unless otherwise specified (see 6.2), the shade of the leather shall be Coyote 498 (see 6.5.2) and shall be drum dyed, struck through from grain to flesh.

TABLE I. Leather characteristics and requirements.

Characteristic

Thickness, ounces

Moisture vapor transmission rate (MVTR), grams per square meter in 24 hours, upright (minimum)

Water absorption resistance, percent absorption (maximum) l!

Oil and stain resistance, grade (minimum)

Abrasion resistance at 1,000 cycles with a CS-10 wheel and 500-gram load

Stiffness, degrees (maximum) l!

Stitch tear, pounds (minimum) l i

Elongation at 25-pound load, percent (maximum) li

Shrink temperature, °C (minimum)

Veslic rubbing abrasion, rating after 80 cycles (minimum) 'J./

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Requirement

2.25 to 2.75

No russet exposure

98±0.5

4, no damage

TABLE I. Leather characteristics and requirements - Continued.

Characteristic Requirement

Cold crack resistance, visual after exposure at -30 °C No cracking

Finish adhesion, newtons/ IO millimeters, dry and wet (minimum) 4

Flexibility and adhesion of finish at 30,000 cycles, at -20 °F No cracking or delamination

Hexane soluble materials, percent (maximum) 'JI 25

Chromic oxide, percent (minimum) 'JI 3.0 pH value (minimum) 3.3

Total ash, percent (maximum) 11 9.0

Determination of chromium (VI) content, mg/kg <3

FOOTNOTES:

l l Passing values in 80 percent of tested samples required to pass.

'l,_/ Value given using the AATCC EPl.

'J./ Calculated on moisture-free basis.

3.5.3 Grip, fingertips. Grip material shall be sewn at the fingertips on the outside of the liner to aid in maintaining grip when the liner is used alone as well as in combination with a shell. The material shall be a 100-denier polyester with a raised hexagonal structure made of silicone and shall conform to the requirements listed in table II when tested as specified in 4.4.3.

TABLE II. Grip requirements.

Characteristic Requirement

Weight, ounces per square yard 11.0 to 14.0

Air permeability, cubic feet per minute (minimum) 18

Thickness (inch) 0.030 to 0.035

Fabric count, yams per inch (minimum):

Warp 125

Fill 100

Puncture propagation, kilogram-force (minimum):

Warp 5

Fill 4

Abrasion, cycles (minimum) 3,000

Hydrostatic, centimeters (minimum) 18

3.5.4 Lining, inside cuff hem and trigger finger. The material used to line the inside cuff and trigger finger shall conform to MIL-DTL-32697.

3.5.5 Lining, front of hand, back of hand, and thumb. The lining used on the front of the hand, the back of the hand, and the inner and outer thumb, shall be a napped lay-in knit fabric. The lay-in for the fabric shall be 100 percent wool and the knit back shall be a 100 percent recycled polyester. The 100 percent wool lay-in shall make up 70±2 percent of the total weight of the fabric and the recycled polyester back shall make up 30±2 percent of the total fabric weight. The wool fiber shall be carded and spun into single yarns. One end of wool yam shall be laid in per knit course. After knitting, the fabric shall be scoured and napped to form a disoriented pile on the face to meet a minimum thickness of 0.090 inch measured under 0.1 pound per square inch (psi). The shade of the fabric shall be natural. The napped lay-in shall conform to the requirements listed in table III when tested as specified in 4.4.3.

TABLE III. Napped wool lay-in requirements.

Characteristic Requirement

Fiber content 100% wool lay-in, 100% recycled polyester back

Weight, ounces per square yard 15.0 to 18.0

Thickness, inches, under 0.1 psi 0.090 to 0.1

Grade (minimum) 54s

Burst strength, pounds (minimum) 100

MVTR, grams per square meter in 24 hours, upright 1,400 (minimum)

Dimensional stability, percent (maximum) (after five laundering cycles):

Wales -8/+l

Courses -1/+8

3.5.6 Insulation. The insulation (see 6.6.4) used between the shell and the lining fabric on the front of the hand, the back of the hand, and the outer thumb shall conform to MIL-PRF-32567 type II, except the weight shall be 4.4±0.5 ounces per square yard; the minimal thickness at 0.01 psi shall initially be 0.60 inch and shall be 0.45 inch after three launderings; and the thermal resistance, in intrinsic clo, shall initially be 2.25 and shall be 1.95 after three launderings. Alternatively, the insulation may conform to MIL-PRF-32567 type III, class 4. For both types, a polyester blend may be used in lieu of the 100 percent polyester specified in MIL-PRF-32567.

3.5.6.1 Scrim. The spun bonded scrim specified in MIL-PRF-32567 shall be applied to one surface of any batting type used and shall be oriented during end item fabrication so the scrim is adjacent to the woven shell or knitted fabric liner, which can abrade the batting fibers causing clumping, roping, and pilling. The scrim shall have a nominal weight of0.4 ounce per square yard and is additional weight over the table I batting weight for each type and class ofMIL-PRF-32567. The scrim shall maintain its structural integrity when laundered as specified in MIL-PRF-32567. The scrim may be lightly adhered to batting ifrequired for the end item construction.

3.5.7 Cuff. A cuff(see 6.6.6) shall be sewn onto the liner and provide a snug fit around the wrist measuring approximately 3 inches at the bottom edge of the cuff, when relaxed, for all sizes. The cuff shall conform to type I, class 2, size 2, ofMIL-C-3735, except that it shall be 100 percent domestic wool at a minimum grade not coarser than US 60s to 62s (25 microns or finer) for comfort. Unless otherwise specified (see 6.2), the shade shall be Coyote 498 (see 6.5.2).

3.5.8 Thread. The thread for all construction seams shall be size letter B (Tex size 45) conforming to A-A-59826, type I, class B. Unless otherwise specified (see 6.2), the color shall be Coyote 498 (see 6.5.2) to approximate the mitten liner.

3.5.9 Labels. Each liner shall have a combination identification-size label and instruction label. The inscription shall have a minimum font size of 10 points. The inscription legibility, label, and label attachment method shall last the expected life of the liner. The fastness to laundering requirements ofMIL-DTL-32075 shall apply. The labels shall identify the item, boldly specify the size, and provide use and care instructions.

3.5.9.1 Identification-size label. The label shall be located on the outside of the terry lining, caught in the side seam of both mittens liners in a pair. The combination identification-size label shall conform to type VI, class 4, MIL-DTL-32075 and shall bear the following inscription:

LINER, TRIGGER FINGER MITTEN

SIZE: MEDIUM (EXAMPLE)

CONTRACT NO.:

CONTRACTOR'S NAME:

FIBER CONTENT:

3.5.9.2 Instruction label. The instruction label for the mitten liner shall conform to type VI, class 3 of MIL-DTL-32075, and shall include the following information:

1. Machine wash on regular cycle in cold water.

2. Do not bleach.

3. Drip dry.

4. Do not iron.

5. Do not dryclean.

DO NOT REMOVE THIS LABEL

3.5.9.3 Combination identification-size instruction label. As an alternate, a combination identification-size instruction label may be used conforming to type VI, class 14 ofMIL-DTL-32075.

3.5.9.4 Label/tag. Each mitten liner shall have an individual barcode placed on a paper tag for personal clothing items conforming to type VIII, class 17 ofMIL-DTL-32075. The paper tag shall contain the National Stock Number (NSN) and shall be standard bleached sulfate having a basis weight of 100 pounds. The paper used for the tags shall have a smooth finish to accept thermal transfer and direct printing. The tags shall have a hole and shall be attached to each pair of liners by a fastener. The tags shall be clearly legible and readable by a scanner.

3.6 Patterns. Standard patterns, providing a seam allowance of 1/8 inch for all seams, and 3/4 inch for the hem, will be furnished by the Government. The list of pattern parts and computer nomenclature in table IV is provided to ensure that the pattern set provided is complete. The Government patterns shall not be altered in any way, and are to be used only as a guide for cutting the contractor's working patterns. The working patterns shall be identical to the Government patterns, except that additional notching, if needed, to facilitate manufacture, is permitted. Also, minor modifications are permitted where necessary to accommodate the manufacturer's processes and the use of automated equipment. These modifications shall not alter the serviceability or appearance requirements of the liner.

3.6.1 List of pattern parts. The component parts shall be cut from the specified material in accordance with the pattern parts listed in table IV.

TABLE IV. Pattern parts.

Material Nomenclature Cut Parts!'

Liner shell BACK OF HAND RIPSTOP 1 left, 1 right

PALM RIPS TOP 1 left, 1 right

OUTER THUMB RIPSTOP 1 left, 1 right

INNER THUMB RIPSTOP 1 left, 1 right

MAIN GUSSET RIPSTOP 1 left, 1 right

PINKY GUSSET RIPSTOP 1 left, 1 right

INSIDE THUMB GUSSET RIPSTOP 1 left, 1 right

OUTSIDE THUMB GUSSET RIPSTOP 1 left, 1 right

Leather TRIGGER FINGER BACK LEATHER 1 left, 1 right

TRIGGER FINGER PALM LEATHER 1 left, 1 right

Grip FINGERTIP GRIP 1 left, 1 right

Lining, napped wool lay-in BACK OF HAND LINING 1 left, 1 right

PALM LINING 1 left, 1 right

OUTER THUMB LINING 1 left, 1 right

INNER THUMB LINING 1 left, 1 right

Insulation BACK OF HAND INSULATION 1 left, 1 right

OUTER THUMB INSULATION 1 left, 1 right

PALM INSULATION 1 left, 1 right

INNER THUMB INSULATION 1 left, 1 right

Lining, wool terry TRIGGER FINGER BACK TERRY 1 left, 1 right

TRIGGER FINGER PALM TERRY 1 left, 1 right

TRIGGER FINGER GUSSET TERRY 1 left, 1 right

CUFF PALM TERRY 1 left, 1 right

CUFF BACK TERRY 1 left, 1 right

Rib knit Cuff 2

FOOTNOTE:

l l With the exception of the cuffs, pieces shall be cut face-to-face to create left and right cut parts.

'1./ Leather shall be cut in a manner that causes the appropriate side to be on the outside of the liner after assembly. This may require pieces to be flipped in the cutting software.

3.7 Construction. The assembled mitten liner (referred to as "end item" in this specification) shall be as specified in table V to ensure uniform appearance, comfort, and durability in garrison use, combat, and field operations. The end item construction and appearance shall conform to the requirements of this document, characteristics specified in table V, and the finished dimensions specified (see 3.9) to maintain item configuration and compliance to end item and component performance tests (see 4.4 and 4.5).

TABLE V. Liner requirements.

Characteristic Requirement Test Method

Clo value (dry thermal insulation, initial) (minimum) 1.7 4.5.2

Clo value ( dry thermal insulation, after 3X 1.5 4.5.2 11 laundering) (minimum)

FOOTNOTE:

l l Launder only; omit dimensional changes.

3. 7 .1 Stitches, seams, and stitching. All seams shall exhibit a uniform appearance and conform to ASTM D6193. Stitch types and stitches per inch shall be as listed in table VI. All material edges shall not ravel.

Edges may be turned-in, turned-under, or serged to prevent raveling.

TABLE VI. Stitch types and stitches per inch.

Operation Stitch Type Stitches per Inch

Topstitch, single needle stitch, or straight stitch 301 8 to 12

Baste 301 or 101 8 to 12

3. 7 .2 Tacking and backstitching. Ends of seams and rows of stitching with 301 type stitch, when not caught in other seams or stitching, shall be securely backstitched not less than 1/4 inch. Thread breaks (all stitch types) shall be secured by stitching back from the break not less than 1/2 inch.

3.8 Color matching.

3.8.1 Visual shade matching. Unless otherwise specified (see 6.2), samples shall be verified for shade matching (see 6.5.2) in accordance with 4.5.3. The color and appearance of the cloth shall approximate the standard sample when tested as specified in 4.5.3.

3.8.2 Color. Unless otherwise specified (see 6.2), the exterior mitten liner materials shall be solid and shall be Coyote 498 in shade (see 6.5.2). The exterior materials and components shall meet the reflectance requirements specified in 3.8.2.1.

3.8.2.1 Spectral reflectance. The finished outer shell cloth and all of the components used shall meet the spectral reflectance values (in percent) for the visible/near infrared wavelength range, 600 to 860 nanometers for the colors specified in table VII as applicable when tested as specified in 4.5.4.

TABLE VII. Spectral reflectance.

Wavelengths Coyote498

Nanometers Minimum Maximum

600 8 20

620 8 20

640 8 22

660 8 24

680 12 24

700 12 34

720 16 42

740 22 46

760 30 50

780 34 54

800 36 56

820 38 58

840 38 58

860 40 60

3.9 Finished measurements. Finished dimensions shall be in accordance with table VIII and measured in accordance with table IX.

A:

Size Back of Hand Width

Small 4-1 /4

Medium 5

Large 5-1/4

Extra Large 5-1/2

Tolerance ±1/4

TABLE VIII. Mitten liner fmished dimensions (in inches).

B: C: D: E: F: G:

Full Wrist Thumb Thumb First First

Length Cuff Length Width Finger Finger Width Length Width

12-1 /2 6 4 3 4-1/4 1-1/4

12-7/8 6-1/4 4-1/8 3 4-1/2 1-1/4

13-1/4 6-1 /2 4-1/4 3 4-3/4 1-1/2

13-5/8 6-3/4 4-3/8 3 5 1-1/2

±1/4 ±1/4 ±1/8 ±1/8 ±1/8 ±1/8

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H:

Finger Mitt

Width

3-1/4

3-1/2

3-3/4

±1 /8

I: J:

Finger IFourchett, Mitt Width

Length

4 1/2

4-1/4 1/2

4-1/2 1/2

4-3/4 1/2

±1/8 ±1/8

TABLE IX. Mitten liner methods of measurement.

Measurement Name Measurement Description

A: Back of hand width Measurement taken on the back of the hand. Measurement parallel to the mitten liner opening, beginning at the side seam where the leather meets the nylon and ending at the opposite side seam.

B: Full length

C: Wrist cuff width

D: Thumb length

E: Thumb width

F: First finger length

Measurement taken on the back of the hand beginning at the seam where the fourchette pieces meet to the bottom of the liner hem staying perpendicular to the liner hem.

Measurement taken on the palm side along the bottom edge of the cuff.

Measurement taken on the back of the hand from the thumb tip following along the fourchette and ending where the fourchette meets the side seam.

Measurement taken across the back of the thumb from seam to seam at the thumb crotch staying parallel with the thumb tip.

Measurement taken on the back of the hand at the center of the finger beginning at the seam where the leather meets the shell down to the bottom of the leather where it meets the nylon.

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Figure

A

TABLE IX. Mitten liner methods of measurement - Continued.

Measurement Name Measurement Description

G: First finger width Measurement taken across the back of the first finger, from seam to seam, parallel to the fingertip, at the finger crotch.

H: Finger mitt width

I: Finger mitt length

J: Fourchette width

Measurement taken across the back of the finger mitt width, from seam to seam, beginning at the finger crotch to the pinky side seam, parallel to the fingertip.

Measurement taken on the back of the hand, beginning at the seam where the fourchette pieces meet, to the finger crotch, staying perpendicular to the liner hem.

Measurement taken at the back of the hand across the fourchette, 1 inch up from the thumb crotch seam, staying parallel to the tip of the thumb.

Figure

G

3.10 Workmanship. The finished mitten liners shall be free from loose thread, foreign matter, and irregular defects that can adversely affect usage or durability. The finished liners shall be uniform in quality, free from defects that adversely affect form, fit, or function, and the defects specified in 4.4.1 . The occurrence of defects shall not exceed the established acceptance quality limits (AQL) (see 6.2) and shall not adversely affect the serviceability, appearance, and uniformity of the product.

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).

4.2 First article inspection. A first article inspection shall consist of the examinations and tests specified in 4.4.

The first article shall be rejected if any associated requirements are not met.

4.2.1 First article samples. The sample size will be specified in the procurement document (see 6.2). The sample unit shall be one pair of mitten liners and the lot size shall be expressed in pairs.

4.3 Conformance inspection. Conformance inspection shall include the examination specified in 4.3.1.

4.3 .1 Conformance inspection samples. Sampling for conformance inspection shall be performed in accordance with ASQ/ ANSI Zl .4 and with AQLs as specified in the contract or order (see 6.2). The sample unit shall be one pair of mitten liners and the lot size shall be expressed in pairs.

4.3 .2 In-process examination. Visual and dimensional examinations shall be made at any point or during any phase of the manufacturing process to determine whether the construction details that cannot be easily examined in the finished product are in accordance with requirements specified in section 3. Materials and components that contain a defect in accordance with 4.4.1 shall be corrected or removed from production.

4.4 Component and end item inspection. In addition to testing provisions specified in reference documents, components shall be tested for the characteristics specified in this specification. Tests shall be conducted with both the specimen and test apparatus under standard conditions as defined in the various ASTM and AATCC test methods. All requirements are applicable to the sample unit. Test reports, when prescribed in the associated test method, evaluation procedure or other cited guidance, should contain the individual values utilized in expressing final results. The lot shall be rejected if one or more sample units fail to meet any test requirement specified.

4.4.1 End item visual examination. The mitten liner shall be examined for defects in shade, design, material, construction, and workmanship, with defects classified in accordance with table X. Defects shall not exceed the AQL specified in the contract or order (see 6.2).

Examination

Mitten pairing

Design

Shade

Cleanness

TABLE X. Defects.

Defect

Not matched and paired left and right, right and left not same size, wide variation in appearance

Not tacked or joined together as specified.

Not as specified (incorrect material, pattern, etc.)

Poorly shaped

Shade variation within a part or between parts

Unacceptable shade change as a result of water repellent treatment application

Any color not as specified

Spot, stain

Excessive thread ends not trimmed or removed

Shade stamp marking on outside

Odor, affecting appearance or serviceability

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Major Minor

Examination

Material and workmanship

Material and workmanship ( continued)

Labels

Packaging

MIL-DTL-32708A

TABLE X. Defects - Continued.

Defect

Any component part omitted, distorted, full, tight, or twisted

Not functioning properly or defective

Any part caught in any unrelated stitching

Cloth material:

Any hole, cut, tear, smash, burn, drill hole, run, thin place, dye streak, misweave or misknit, knot or slub affecting appearance or serviceability

Leather:

Not specified color

Not full grain

Flesh side not smooth or contains area of coarse, loose fibers

Not clean-stained, or foreign matter

Hard, boney, loose, spongy leather, hard scar

Cut or hole

Seam (defect affecting appearance or serviceability)

Not specified type

Puckered, distorted, pleated, wavy, twisted, irregular, or open

Loose or tight stitch tension, broken or missing thread or stitch

Needle cutting, needle chew, visible mend

Edge or raised stitching sewn too close to the edge resulting in damage to the cloth

Seam allowance not as specified

Visible raw edge

Any visible perforations from removed stitches

Poorly assembled and affecting serviceability

Difference in overall length between the front and back of the mitten liner is greater than 1/2 inch

Unwanted permanent fold, pleat, or crease in the fabric or mitten, affecting appearance or serviceability

Omitted, incorrect, illegible, not attached where specified

Barcodes omitted, not readable by scanner

Human-readable interpretation omitted or illegible

Barcode not visible on folded, packaged item; barcode attachment causes damage to the item.

Not packaged in accordance with the contract or purchase order (see 6.2)

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Major Minor

4.4.2 Dimensional examination. The end item shall be examined for conformance to the dimensions specified in table VIII.

4.4.3 Component testing. The components (see 3.5.2 through 3.5.5) shall be tested for characteristics listed in table XI. The methods of test shall be as specified in table XI. The testing requirements and test sampling plan shall be as specified in the test method.

TABLE XI. Component tests.

Characteristic Requirement

Test Method Paragraph

Thickness Table I ASTMD1814

MVTR Table I ASTMD5052

Water absorption resistance Table I 4.5.1

Oil and stain resistance Table I AATCCTM118

Abrasion resistance Table I ASTMD7255

Stiffness Table I ASTMD2821

Stitch tear Table I ASTMD4705

Elongation at 25 pound load Table I ASTMD2209

Shrink temperature Table I ASTMD6076

Veslic rubbing abrasion 11 Table I ISO 11640

Cold crack resistance Table I ASTMD1912

Finish adhesion Table I ASTM D6182

Flexibility and adhesion of finish at 30,000 cycles Table I ASTM D6182

Hexane soluble material 21 Table I ASTMD3495

Chromic oxide Y Table I ASTMD2807 pH value Table I ASTMD2810

Total ash'Y Table I ASTMD2617

Determination of chromium (VI) content Table I ISO 17075-2

Weight Tables II and III ASTM D3776/D3776M

Air permeability Table II ASTMD737

Thickness Table II ASTMD1777

Fabric count Table II ASTMD3775

Puncture propagation Table II ASTMD2582

Abrasion Table II ASTMD3884

Hydrostatic pressure Table II AATCC TM127

Fiber content ~ Table III AATCCTM20

Thickness Table III ASTMD1777

Grade±! Table III USDA United States Standards for

Burst strength

MVTR

Dimensional stability

Table III

Table III

Table III

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Grades of Wool

ASTMD6797

ASTM E96/E96M, procedure B

AATCC TM135, 2, II, Aii

TABLE XI. Component tests - Continued.

FOOTNOTES:

l i Value shall be obtained using the AA TCC EP 1.

Testing shall be conducted and result calculated on moisture-free basis.

Testing shall be conducted on a scoured form.

A certificate of compliance may be submitted to address the stated requirement ( see 6. 7).

4.4.4 End item testing. The finished liners shall be tested for the characteristics listed in table XII according to the specified methods. The testing requirement and test sampling plan shall be specified in 4.5 .2.

TABLE XII. End item testing.

Characteristic Requirement Paragraph Verification

Clo (dry thermal insulation) value 3.7 4.5.2

4.5 Examinations and tests.

4.5.1 Water absor_ption resistance test. One 3-inch diameter specimen shall be tested from each 12-by-12-inch test area. Prior to testing, the specimen shall be allowed to reach moisture equilibrium in the standard atmospheric conditions environment, as specified in ASTM D1610. A stainless steel 500-milliliter, 3-inch diameter, 5-inch-long container with a rubber gasket and cover shall be used to test the specimen. The specimen shall first be weighed (to the nearest 0.01 gram) and then shall be placed inside the cover with the flesh side of the specimen next to the inside of the cover. The rubber gasket shall then be placed inside the cover and against the grain surface of the leather specimen. One-hundred milliliters of distilled or deionized water at 23 °C shall then be added to the container. The cover with the specimen and gasket shall then be secured to the container. The container shall then be inverted so the water is against the grain surface of the specimen. The inverted container shall be placed on a flat surface and allowed to remain in the inverted position for 30 minutes. At the end of 30 minutes, the container shall be placed upright and the cover shall be removed and placed on a flat surface. The inside of the cover shall face the flat surface. The cover shall be tilted so the outer edge of the bottom is raised 1 to 1-1/2 inches from the flat surface and allowed to drain for 5 minutes. After 5 minutes, the specimen shall be removed from the cover, held by its edge, and shook briskly once to remove any free moisture from the surface of the specimen. The specimen shall be immediately reweighed to the nearest 0.01 gram; the percent water absorption shall be calculated as follows:

Where:

. (W2 - Wl) x 100 Percent water absorption = -'-----'-w1

Wl = Original weight of conditioned specimen

W2 = Weight of specimen after being subject to water

4.5.2 Thermal insulation test. Three separate samples of the mitten liners shall be evaluated in accordance with ASTM F3426 and the average value is reported. Total thermal resistance (R) values can be converted to the more familiar clo unit, by multiplying the R value by 6.45, to allow ranking order of standard for procurement purposes.

Test size shall be right hand, size large. A life-sized biophysical model of the human hand that measures localized and total thermal resistance shall be used. Insulation values for the total hand model and its seven individual regions are calculated by an internal program during 30 minutes of steady state data collection. The ambient temperature shall be maintained at 5±0.5 °C and the surface of the hand model is controlled at 35±0.5 °C. The relative humidity shall be 50±5 percent and wind speed shall be maintained at 0.4±0.1 meter per second. Samples evaluated after laundering shall be laundered in accordance with AATCC TM150, option 1, ill, A, iii. Total thermal resistance (R) to heat exchange is calculated in the test conditions stated above and using:

Where:

R is the thermal resistance, m2 °C/watt

MIL-DTL-32708A

(SA x delta T) R=-----p

SA = total surface area of seven regional segments, m2

Delta T = temperature gradient between the hand model surface and ambient air temperature, °C

P = Total power input, watts

If required (see 6.2), mitten liners submitted will be tested by the Government. Testing at alternate facilities shall require side-by-side comparison due to chamber wind speed differences that cannot be controlled that will affect the total measured values.

4.5.3 Visual shade matching. Samples shall be viewed using AATCC EP9, option C (see 6.5), with sources simulating artificial daylight D65 illuminant (see 6.5.1) with a color temperature of6500±200 Kelvin (K) illumination of 100±20 foot candles, and under incandescent A illuminant with a color temperature of 2856±200K.

4.5.4 Spectral reflectance test. Spectral reflectance data shall be obtained from 600 to 860 nanometers at 20-nanometer intervals on a spectrophotometer relative to the polytetrafluoroethylene family of compounds, the preferred white standard. Other white reference materials may be used provided they are calibrated to absolute white or vitrolite tiles. The spectral band width shall be less than 20 nanometers at 860 nanometers. Reflectance measurements shall be made by either the monochromatic or polychromatic mode of operation. When the polychromatic mode of operation is used, the spectrophotometer shall operate with the specimen diffusely illuminated with the full emission of a continuous source that simulates in the visible spectrum either International Commission on Illumination (CIE) source A or CIE source D65 (see 6.5.1 ). The specimen shall be viewed at an angle of no greater than 10 degrees from normal, with the specular component included. Measurements shall be taken on a minimum of two different areas and the data averaged. The specimen shall be measured as a single layer backed with three layers of the same fabric and shade. Specimens shall be oriented in different directions during testing. When possible, the specimens tested shall not contain the same warp and filling yams. The diameter for standard aperture size used in the color measurement device shall be the largest possible for each color. The measured areas should be at least 6 inches away from the selvage. Photometric accuracy of the spectrophotometer shall be within 1 percent and wavelength accuracy within 2 nanometers. Any color having spectral reflectance values falling outside the limits at four or more of the wavelengths specified shall be considered a test failure.

5. PACKAGING

5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these personnel need to contact the responsible packaging activity to ascertain packaging requirements. Packaging requirements are maintained by the Inventory Control Point's packaging activities within the Military Service 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. This liner is intended for wear by military personnel of the Department of Defense during extreme cold weather conditions in combination with a full mitten shell or a trigger finger mitten shell conforming to types I and II ofMIL-DTL-32707.

6.2 Acquisition requirements. Acquisition documents should specify the following:

a. Title, number, and date of this specification.

b. Sizes required (see 1.2).

c. The specific issue of individual documents referenced (see 2.2 and 2.3).

d. Applicable Government patterns, including revisions.

e. When first article sample is required (see 3.1.1 , 4.2, and 6.3).

f. When conformance inspection is required (see 3.1.2).

g. Shade standard information (see 3.5.2, 3.5.7, 3.5.8, 3.8.1, 3.8.2, and 6.5.2).

h. AQLs (see 3.10, 4.2.1, and 4.4.1).

1. Number of first article inspection samples (see 4.2.1).

j . When the mitten liners require thermal insulation testing by the Government (see 4.5.2).

k. Packaging requirements ( see 5 .1).

6.3 First article. When first article inspection is required, the contracting officer should provide specific guidance to offerors whether the item(s) should be a first article sample, a first production item, or a standard production item from the contractor's current inventory, and the number of items to be tested as specified in 4.2.

Invitations for bids should provide that the Government reserves the right to waive the requirement for samples for first article inspection to those bidders offering a product that has been previously acquired or tested by the Government and that bidders offering such products, who wish to rely on such production or test, must furnish evidence with the bid that prior Government approval is presently appropriate for pending contract. Bidders should not alternate submit bids unless specifically requested to do so in the solicitation.

6.4 Standard sample. For standard samples, address the procuring activity issuing the invitation for bids or request for proposal.

6.5 Visual shade matching. In 2017, option A of AA TCC EP 9 was changed to option C. NOTE: In case of confusion, the viewing geometry should be such that the specimen plane and illumination source are 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-degree angle relative to the horizontal. The observer will view the specimens at a 90-degree angle, relative to the plane of the specimens.

6.5.1 D75 illuminant. The use ofD75 illuminant with a color temperature of7500±200K and illumination of 100±20 foot candles in lieu of the specified D65 illuminant (see 4.5.4) is permitted.

6.5.2 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.

6.6 Sources of supply.

6.6.1 Basic shell material. 70 denier nylon ripstop (see 3.5.1) has been shown to meet the requirements of this specification. A known source of this material is:

Brookwood Companies, Inc.

485 Madison A venue, Suite 500

New York, NY 10022

Phone: 212-551-0100

Fax: 646-472-0294 https://brookwoodcompanies.com/

6.6.2 Grip, fingertips. Style #700554-700 (see 3.5.3) has been shown to meet the requirements of this specification. A known source of this material is:

Super Fabric

570 Hale Ave. N.

Oakdale, MN 55128

Phone: 651-730-6203 www .superfabric.com

6.6.3 Lining, inside cuff hem and trigger finger. 100 percent wool napped French terry, style# 2196-10 (see 3.5.4) has been shown to meet the requirements of this specification. A known source of this material is:

Draper Knitting Company

28 Draper Lane

Canton, MA 02021-1693

Phone: 1-800-808-7707 www .draperknitting.com

6.6.4 Lining, front of hand, back of hand, and thumb. Napped wool lay-in, style #2162 (see 3.5.5) has been shown to meet the requirements of this specification. A known source ofthis material is:

Draper Knitting Company

28 Draper Lane

Canton, MA 02021-1693

Phone: 1-800-808-7707 www.draperknitting.com

6.6.5 Insulation. A known source that meets the requirements of the material specified in 3.5.6 is:

Climashield

641 Northpark Drive

Clinton, TN 3 7716

Phone: 865-463-6184

Fax: 865-463-6188 www .climashield.com

6.6.6 Cuff, rib. A known source that meets the requirements of the material specified in 3.5.7 is:

Minnesota Knitting Mills

1450 Mendota Heights Rd

St. Paul, MN 55120

Phone: 651-452-2240 sales@mnknit.com

6. 7 Certificates of compliance. A certificate of compliance may be acceptable for addressing selected test requirements at the discretion of the contracting agency. It is recommended that contractors submit a request to the contracting agency to obtain permission to use certificates of compliance before relying on their acceptance.

6.8 NSN information. The NSN for a representative sample of the mitten liners is provided below. This is not intended to be an exhaustive list.

Size

Medium

NSN

8415-01-697-9022

6.9 Subject term (key word) listing.

Handwear

Leather

Nylon

Outer shell

6.10 Changes from previous issue. Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extent of the changes.

!Nylon Ripstop

Leather

Grip

MIL-DTL-32708A

FIGURE 1. Back of hand view.

Custodians:

Army-GL Navy-MC

Review activities:

Army-AV,MI Navy-AS, CGI, NU Air Force - 11

DLA-CT

Civil agency:

GSA-FAS

MIL-DTL-32708A

CONCLUDING MATERIAL

Preparing activity:

Navy-MC (Project 8440-2024-002)

NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at https://assist.dla.mil.