Att 002 TF Mitten Shell Spec 04082021_RFP_FINAL.pdf

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AMSC N/A FSC 8315

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

INCH-POUND

MIL-TFM-003

31 March 2021

DETAIL SPECIFICATION

MITTEN SHELL, TRIGGER FINGER, U.S. MARINE CORPS

This specification is approved for use by the United States Marine Corps and is available for use by all Departments and Agencies of the Department of Defense.

1. SCOPE

1.1 Scope. This document covers the requirements for the U.S. Marine Corps Trigger Finger Mitten Shell. This item is intended for wear by military personnel of the Department of Defense during extreme cold weather conditions in combination with a Trigger Finger Mitten Liner conforming to MIL-TFM-005.

1.2 Classification. The Mitten Shell will be of one type in the following sizes, as specified (see 6.1).

1.2.1 Schedule of sizes.

SMALL MEDIUM LARGE X-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.

DEPARTMENT OF DEFENSE SPECIFICATIONS

MIL-W-5664 Webbing, Textile Elastic 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-PRF-32567 Batting, Synthetic Fibers, Unquilted A-A-59826

MIL-TFM-002

Thread, Nylon Cloth, 70D Nylon Ripstop

MIL-TFM-004 Laminate, Nylon Taslan

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

mailto:USMC_STDZ@usmc.mil http://quicksearch.dla.mil/

MIL-TFM-003 DATED 31 March 2021

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 Evaluation Procedure for Visual Assessment of Color Difference of Textiles AATCC TM61 Test Method for Colorfastness to Laundering, Home and Commercial; Accelerated AATCC TM118 Test Method for Oil and Stain Resistance

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

AMERICAN SOCIETY FOR QUALITY (ASQ)

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

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

ASTM INTERNATIONAL

ASTM D1776 Standard Practice for Conditioning and Testing Textiles ASTM D1814 Standard Test Method for Measuring Thickness of Leather Units ASTM D1912 Standard Test Method for Cold-Crack Resistance of Upholstery Leather ASTM D2209 Standard Test Method for Tensile Strength of Leather ASTM D2617 Standard Test Method for Total Ash in Leather ASTM D2807 Standard Test Method for Chromic Oxide in Leather (Perchloric Acid

Oxidation) ASTM D2810 Standard Test Method for pH of Leather ASTM D2821 Standard Test Method for Measuring the Relative Stiffness of Leather by

Means of a Torsional Wire Apparatus ASTM D3495 Standard Test Method for Hexane Extraction of Leather ASTM D4705 Standard Test Method for Stitch Tear of Leather, Double Hole ASTM D5052 Standard Test Method for Permeability of Leather to Water Vapor ASTM D6076 Standard Test Method for Shrinkage Temperature of Leather ASTM D6193 Standard Practice for Stitches and Seams ASTM D6182 Standard Test Method for Flexibility and Adhesion of Finish on Leather ASTM D7255 Standard Test Method for Abrasion Resistance of Leather

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

INTERNATIONAL ORGANIZATION FOR STANDARDIZATION

ISO 11640

ISO 11644

ISO 17075

Leather – Tests for Color Fastness – Color Fastness to Cycles of To-and-fro Rubbing.

Leather – Test for Adhesion of Finish Leather – Chemical Tests – Determination of Chromium (VI) Content

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

NATIONAL FIRE PROTECTION ASSOCIATION

NFPA 1971 Standard on Protective Ensemble for Structural Fire Fighting (2000 Edition)

(Applications for copies of NFPA Test Methods should be addressed to: National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02269-9101.)

https://www.aatcc.org/ http://www.asq.org/ http://www.astm.org/ http://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 with 4.2.

3.1.2 Conformance inspection. When specified (see 6.2), a sample shall be subjected to a conformance inspection in accordance with 4.4.

3.2 Standard sample. The finished Trigger Finger Mitten Shell and design shall match the standard sample (see 6.3) 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 Materials and components. The materials and components shall conform to applicable specifications, standards, drawings, and patterns required herein.

3.4.1 Basic shell material. The cloth used to construct the mitten outer shell shall be a 70 denier nylon taslan with a waterproof breathable barrier backed with tricot knit. The material shall conform to MIL-TFM-002 (see 6.5.1).

3.4.2 Leather. The leather used to construct the palm, gusset, and a portion of the thumb shall be a 2.25 – 2.75 ounce full grain goatskin conforming to the requirements in table I when tested as specified. The leather shall be chrome tanned, light finish, fungicide and durable water repellent treated, backed by a waterproofing layer. The suede side shall be used to construct a “nose wipe” on the back of the thumb. The shade of the leather shall approximate coyote 498, conforming to Leather Shade Standard Number 3898, and shall be drum dyed, struck through from grain to flesh.

TABLE I. Leather characteristics and requirements.

Characteristic Requirement Verification Thickness, ounces 2.25 – 2.75 Table X Moisture Vapor Transmission Rate, grams/square meter/24 hours (minimum)

500 Table X

Water Absorption Resistance, percent absorption (maximum) 1/

80% of samples - 15 Table X

Oil and Stain Resistance, Grade (minimum) 4 Table X Abrasion Resistance at 1000 cycles with CS-10 wheel and 500 gram load

No russet exposure Table X

Stiffness, degrees (maximum) 1/ 80% of samples – 50 Table X Stitch Tear, pounds (minimum) 1/ 80% of samples - 17 Table X Elongation at 25 pound load, percent, (maximum) 1/ 80% of samples - 25 Table X Shrink Temperature, degrees Celsius (minimum) 98 +/- 0.5 Table X Veslic rubbing abrasion, 80 cycles (minimum) 2/ 4; No damage Table X Cold Crack Resistance, degrees Celsius No cracking at -30 Table X Finish Adhesion, Newtons/10 millimeters, dry & wet (minimum)

4.0 N / 10 mm

Table X

Flexibility and Adhesion of Finish at 30,000 cycles, degrees Fahrenheit

No cracking or delamination at -20

Table X

Hexane Soluble Material, percent (maximum) 3/ 25 Table X

Chromic Oxide, percent (minimum) 3/ 3.0 Table X pH value (minimum) 3.3 Table X Total Ash, percent (maximum) 3/ 9.0 Table X Determination of Chromium (VI) Content, mg/kg < 3 Table X

FOOTNOTES:

1/ Eighty percent (80%) of tested samples required to pass.

2/ Value given using the AATCC Grey Scale.

3/ Calculated on moisture-free basis.

3.4.3 Lining material. The lining material used to construct the full inside lining of the mitten shall be a water repellent urethane coated 70 denier nylon ripstop conforming to MIL-TFM-002, Cloth, 70D Nylon Ripstop (see 6.5.2).

3.4.4 Insulation. The insulation used on the back of the hand and outer thumb shall conform to Type I, Class 2 or 3, Type II, Class 3, or Type III, Class 4 of MIL-PRF-32567 (see 6.5.3) with the following exceptions: denier is not required to be as specified; fibers are not required to be hollow core; the clo prior to initial laundering shall be a minimum of 2.3 and after laundering shall be a minimum of 2.1; fibers for all classes shall be polyester and one of the following, or a mixture of the following: continuous filament, staple cut fibers, and/or microfibers.

3.4.5 Elastic. The elastic shall be attached at the inner wrist of the mitten shell using a stretch stitch (such as zig-zag) to gather for a closer fit. It shall be 1 inch in width and conform to the requirements of Type II, Class 1 of MIL-W-5664. (see figure 1).

3.4.6 Webbing. Webbing shall be used to form a strap at the back of the wrist. Webbing shall be attached at the thumb side seam of the mitten to form a loop for attachment of the buckle (see 3.4.7). The cut length of the loop shall be 2 (±1/8) inches long. Webbing shall be attached at the outer side seam (pinky side) to engage with the buckle to tighten for a closer fit. The cut length of this webbing shall be 11 inches; the end shall be folded over 5/8 inch, then folded a second time and top stitched through the three plies 1/2 (±1/16) inch from the folded end. This shall create a finished loop impeding the buckle from being removed from the webbing as well as creating a “pull tab” to tighten for a closer fit. The length of the finished loop shall be 7/8 (±1/8) inch. The webbing shall be ¾ inch wide conforming to MIL-PRF-17337. The color shall approximate coyote 498, or tan 499 (see figure 2).

3.4.7 Buckle. The buckle (see 6.5.4) shall engage with the webbing to tighten the mitten at the wrist for a closer fit. It shall be ¾ inch acetal, and the color shall approximate coyote 498.

3.4.8 Adjustable lanyard. An adjustable lanyard (see 6.5.5) shall be sewn into the inside lining seam (thumb side) of the shell. The lanyard shall be ¼-inch flat nylon cord. The lanyard shall be adjustable using a barrel lock (see 3.4.9.1).

The ends of the lanyard shall be finished off in a way to restrict the barrel lock from being removed when attached to the mitten shell. The lanyard shall approximate black or coyote 498 to approximate the shell (see figure 1).

3.4.8.1 Barrel lock. A barrel lock (see 6.5.6) shall be used to allow for adjustment of the lanyard. The color of the barrel lock shall approximate coyote 498 to approximate the shell. The barrel lock shall normally be in the closed position, cinching the cord, when no pressure is on the plunger.

3.4.9 Thread. The thread for all construction seams shall be nylon, size letter B (Tex size 45), non-wicking, with a minimum break strength of 6 pounds. The thread shall conform to A-A-59826 Type I, Class B. The color shall approximate coyote 498 to approximate the mitten shell.

3.4.10 Elasticized Draw Cord. An elasticized draw cord (see 6.5.7) shall run through the hem of the mitten cuff and be adjustable using a cord lock (see 3.4.11). The draw cord shall allow for adjustment via a finished off opening, approximately 1/2 inch in length at the outer side seam (pinky side). The draw cord shall pull out through the opening and through the cord lock. To restrict the cord lock from being removed from the elasticized draw cord, a cord end shall be used (see 3.4.12). The elastic shall be sufficient for continuous expansion and relaxation, and when relaxed.

The elastic shall allow for comfort on the arm, and provide desired closure over various clothing layers. The cord shall be an 1/8-inch elastic cord. The color shall approximate the mitten shell (see figure 1).

3.4.11 Cord lock. A cord lock (see 6.5.8) shall be used to allow for adjustment of the elasticized draw cord and shall attach to the outer side seam (pinky side) of the mitten using 3/8-inch nylon tape (see 3.4.15). The color shall approximate the mitten shell (see figure 1).

3.4.12 Cord End. A cord end (see 6.5.9) shall be used on the elasticized draw cord, to restrict the cord lock from being removed. The color of the cord end shall approximate coyote 498 (see figure 1).

3.4.13 Clasp. A clasp (see 6.5.10) shall be attached on opposite sides of the left and right mitten side seams to allow them to be clipped together as a pair. 3/8-inch wide nylon tape conforming to 3.4.15 shall be used for attachment of the clasp (see figure 2).

3.4.14 Nylon Tape. Nylon tape shall be used to construct a loop to secure the cord lock (see 3.4.11) to the outer side seam (pinky side) of the cuff. The loop shall be long enough to allow for easy use of the cord lock and lanyard. The tape shall also be used to create a tab on the opposite end of the cord lock; after looping through the end it shall be stitched double-ply. The end of the tape shall be seared with minimal melting to allow for reduction of fraying without excess hardening of the tape edges. The tab shall have a finished length of 1-1/2 inches. The tape shall be nylon, 3/8 inch in width and conform to Type III of MIL-DTL-5038. The color shall approximate Coyote 498; black may be used as an alternate (see figure 1).

3.4.15 Seam Tape. The mitten shell shall be seam taped, providing complete water proofing. The seam tape shall conform to the requirements specified in table II.

TABLE II. Seam tape.

Location(s) Number of Layers Width (in inches) Thumb Joining tips

2 5/8

Side seams Elastic Fingertips

2 7/8

Finger tabs 3 5/8

3.4.16 Labels. Each mitten 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 mitten. The fastness to laundering requirements of MIL-DTL-32075 shall apply. The labels must boldly specify size, identify the item, and provide use and care instructions.

3.4.16.1 Identification-size label. The label shall be located inside the mitten on the back of the wrist of both mittens in a pair. The combination identification-size label shall conform to Type VI, Class 4, MIL-DTL-32075 and shall bear the following inscription:

Identification Information

MITTEN SHELL, TRIGGER FINGER

CONTRACT NO.:

CONTRACTOR’S NAME:

FIBER CONTENT:

3.4.16.2 Instruction label. The instruction label for the mitten shall conform to Type VI, Class 3 of MIL-DTL-32075, and shall include the following information:

Mitten Instruction Label Contents

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

3.4.16.3 Combination identification-size-instruction label. As an alternate, a combination identification-size-instruction label may be used conforming to Type VI, Class 14 of MIL-DTL-32075.

3.4.16.4 Label/tag. Each mitten shall have an individual bar code placed on a paper tag for personal clothing items conforming to Type VIII, Class 17 of MIL-DTL-32075. The paper tag shall contain the 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 item by a fastener. The tags shall be clearly legible and readable by a scanner.

3.5 Design. The Trigger Finger Mitten Shell is an outer mitten designed to be worn in combination with a liner in extreme cold weather environments when enhanced dexterity is needed as compared to a full mitten shell. The trigger finger design shall enable the wearer to move their first finger independently from the rest of the hand, but if needed move their first finger into the larger finger compartment to warm up as needed. The shell shall be part of a system that includes a removable insulated trigger finger mitten liner conforming to MIL-TFM-005 that can be worn over a glove insert if desired. The mitten shell shall consist of the following; the outside shell shall be constructed from a waterproof Nylon Taslan conforming to 3.4.1, and a water repellent goatskin leather palm conforming to 3.4.2 which shall be backed by a waterproofing layer. The suede side of the leather shall be used to construct a “nose wipe” on the back of the thumb. The outer shell fabric shall also be durable water repellent treated, and the inside seams shall be seam taped to provide waterproofing. The mitten shell shall be insulated on the back of the hand and thumb, conforming to 3.4.4; and the palm, back of the hand, gauntlet, and finger/ thumb portions shall be lined with 70D Nylon Ripstop conforming to 3.4.3. This inside lining shall be tacked to the shell at several locations to ensure the lining material does not separate from the shell. This shall be accomplished by using the seam seal tape to create tabs on the tip of the thumb, tip of the trigger finger, in addition to the top and side of the finger portion of the mitten; these tabs shall then be tacked to the seam allowance of the liner. The mitten shell shall have an elasticized inner wrist and an adjustable strap at the back of the wrist to provide a close fit, with a long gauntlet that shall extend up the forearm with a manual adjustment feature at the end of the cuff to provide desired closure over various clothing layers. An adjustable lanyard shall be attached to the hem; adjustment shall be operational with one hand. The outside of the shell shall have a feature at the side seam that enables the mittens to be clipped together as a pair when not in use (see 3.4.13). The shell shall have a label to identify the item, its size, and use and care. (see figures 1 & 2).

3.6 Patterns. Standard patterns, providing a seam allowance of 1/8 inch for all shell seams, and 1/4 inch for hem and lining seams, will be furnished by the Government. The list of pattern parts and computer nomenclature in table III is provided to insure 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 will be identical to the Government patterns, except that additional notching, if needed, to facilitate manufacture is possible. 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 these garments.

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 III.

TABLE III. Pattern Parts.

Material Nomenclature Cut Parts Basic Shell Material Back of hand 1 left; 1 right

Cuff palm 1 left; 1 right Palm 1 left; 1 right

Inner thumb 1 left; 1 right Outer thumb 1 1 left; 1 right Outer thumb 2 1 left; 1 right Finger gusset 1 left; 1 right Outer finger gusset 1 left; 1 right Elastic cover 1 left; 1 right

Leather Palm 1 left; 1 right Inner thumb 1 left; 1 right Finger gusset 1 left; 1 right Outer finger gusset 1 left; 1 right

Leather (suede side) Outer thumb 1 left; 1 right Lining material Cuff back 1 left; 1 right

Cuff palm 1 left; 1 right Back of hand 1 left; 1 right Palm 1 left; 1 right Outer thumb 1 left; 1 right Inner thumb 1 left; 1 right Gusset 1 left; 1 right

Insulation Back of hand 1 left; 1 right Outer thumb 1 left; 1 right

3.7 Construction. Assembled mitten shells (referred to as “end item” in this specification) shall meet the following specifics in table IV, needed to ensure uniform appearance, comfort and durability in garrison use, combat, and field operations. End item construction and appearance shall conform to the requirements of this document, garment characteristics specified in table IV, and the finished dimensions as specified in table VII, to maintain item configuration and compliance to end item and component performance tests (see 4.5 and 4.6).

TABLE IV. End item requirements.

Characteristic Requirement Test Method

Clo (dry thermal insulation) (minimum) value, 1/ 2.2 see 4.6.2 Liner Retention: pounds (minimum) 6 see 4.6.3

Whole Glove Leak Test, 2 psi at 5 seconds min

OR

Overall Liquid Integrity

Pass

Pass see 4.6.4

FOOTNOTES:

1/ Testing will be performed in combination with the insulated removable liner conforming to MIL-TFM-005.

Requirement listed is the system requirement.

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 V. All material edges shall not ravel. Edges may be turned-in, turned-under, or serged to prevent raveling.

TABLE V. Stitch types and stitches per inch.

Operation Stitch Type Stitches Per Inch Topstitch, single needle stitch, or straight stitch

301 8-12

3 step zig zag 315 10-12 Baste 301 or 101 8-12

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 ¼ inch. Thread breaks (all stitch types) shall be secured by stitching back of the break not less than ½ inch.

3.8 Color matching.

3.8.1 Visual shade matching. The color and appearance of the materials and components shall approximate the standard sample when tested in accordance with 4.6.6.

3.8.3 Color. The exterior mitten materials shall be solid and shall closely approximate Coyote 498 shade, which complies with the AMS STD chip #20150. The exterior materials and components shall meet reflectance requirements specified in paragraph 3.8.3.1.

3.8.3.1 Spectral reflectance. The finished outershell cloth and all components used shall meet the spectral reflectance values (in percent) for the visible/near infrared wavelength range, 600 to 860 nanometers (nm) for the colors specified in table VI as applicable when tested as specified in 4.6.5.

TABLE VI: Spectral reflectance.

Wavelengths Coyote 498 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 VII, and measured in accordance with table VIII. (see figures 3 – 12).

THIS SECTION INTENTIONALLY LEFT BLANK

TABLE VII. Mitten shell finished dimensions (in inches).

A:

Back of hand width

B:

Full length

C:

Wrist width, relaxed

D:

Thumb length

E:

Thumb width

F:

First finger length

G:

First finger width

H:

Finger mitt width

I:

Finger mitt length

J Fourchette width:

Small 5 3/8 16 ¼ 5 2 7/8 2 ¼ 2 ¾ 1 ½ 3 ½ 3 ¼ 1 1/8 Medium 5 5/8 17 5 ¼ 3 2 ¼ 3 1 ½ 3 ¾ 3 ½ 1 1/8 Large 5 7/8 17 3/8 5 ½ 3 1/8 2 ¼ 3 ¼ 1 5/8 4 3 ¾ 1 1/8 X-Large 6 1/8 17 3/4 5 ¾ 3 1/4 2 ¼ 3 ½ 1 5/8 4 ¼ 4 1 1/8 ¼ ¼ ¼ 1/8 1/8 1/8 1/8 1/8 1/8 1/8

TABLE VIII. Mitten shell methods of measurement.

Measurement name

Measurement description Figure number

A: Back of hand width

Measurement taken on back of hand with adjustable strap loosened.

Measure parallel to mitt opening across the widest part of the mitten, beginning and ending at the seams joining the shell material to leather fourchette.

Note: widest part of mitten is even with thumb crotch seam.

See Figure 3

B: Full length Measurement taken on back of hand at center of mitten from top seam (where joining leather fourchette seam meets shell material) to bottom of cuff.

See Figure 4

C: Wrist width, relaxed

Measurement taken on palm side, following the zig zag seam closest to leather palm.

See Figure 5

D: Thumb length Measurement taken from thumb tip following suede to leather seam ending at bottom of seam at thumb crotch.

See Figure 6

E: Thumb width Measurement taken across back of thumb suede, parallel to thumb tip, from intersection of thumb crotch seam to edge where suede meets shell.

See Figure 7

F: First finger length

Measurement taken on back of hand at center of finger beginning at the fingertip seam down to the finger crotch seam.

See Figure 8

G: First finger width

Measurement taken across back of first finger (from seam to seam where shell material meets leather), parallel to fingertip, mid-way between tip and finger crotch.

See Figure 9

H: Finger mitt width

Measurement taken across back of finger mitt width (from seam to seam where shell material meets leather), beginning at finger crotch to pinky side seam, parallel to fingertip.

See Figure 10

I: Finger mitt length

Measurement taken down length of finger mitt, perpendicular to cuff, beginning from top seam (where joining leather fourchette seam meets shell material) to finger crotch.

See Figure 11

J: Fourchette width

Measurement taken across fourchette, 2 inches up from thumb crotch. See Figure 12

3.10 Workmanship. The finished mitten shells shall be free from loose thread, foreign matter, and irregular defects that can adversely affect usage or durability. The finished items shall be uniform in quality, free from defects that adversely affect form, fit or function and those defects specified in table IX.

4. VERIFICATION

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

a. First article inspection (see 4.3).

b. Conformance inspection (see 4.4).

4.2 Inspection conditions. Unless otherwise specified, excluded, amended, modified or qualified in this specification or applicable procurement documents (see 6.2), all inspections shall be performed in accordance with all the requirements of referenced documents.

4.3 First article inspection. A first article inspection shall consist of the examinations and tests specified in tables VII – XI. The first article inspection shall be unacceptable if any associated requirements are not met.

4.3.1 First article samples. Unless otherwise specified in the procurement document, first article samples shall be provided. The sample size will be specified in the procurement document. The sample unit shall be one pair of mitten shells and the lot size shall be expressed in pairs.

4.4 Conformance inspection. In accordance with 4.1, conformance inspection shall include the examination specified in 4.4.1. Sampling for inspection shall be performed in accordance with ASQ/ANSI Z1.4.

4.4.1 Conformance inspection samples. Sampling for conformance inspection shall be performed in accordance with ASQ/ANSI Z1.4 (see 6.2). The sample unit shall be one pair of mitten shells and the lot size shall be expressed in pairs.

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

4.5 Component and end item inspection. In accordance with 4.1; and unless otherwise excluded, amended, modified, or qualified in this specification or applicable purchase document; components and end items shall be inspected in accordance with all the requirements of referenced specifications, drawings, and standards. All requirements are applicable to the sample unit. All test reports shall contain the individual values utilized in expressing final results. The lot shall be unacceptable if one or more sample units fail to meet any test requirement specified.

4.5.1 End item visual examination. The end item shall be visually examined for compliance to 3.5. The mitten shell shall be examined for defects in shade, design, material, construction, and workmanship, with defects classified in accordance with table IX.

TABLE IX. Defects.

EXAMINATION DEFECT MAJOR MINOR

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

Not tacked or joined together as specified. 201 Design Not as specified (incorrect material, pattern, etc.) 102

Poorly shaped 202 Buckles or hardware positioned incorrectly. 103

Shade Shade variation within a part or between parts 104 Unacceptable shade change as a result of water repellent treatment application

Any color not as specified. 106 Cleanness Spot, stain 203

Excessive thread ends not trimmed or removed 204 Shade stamp marking on outside 205 Odor, affecting appearance or serviceability. 206

T

TABLE IX. Defects. Continued

EXAMINATION DEFECT MAJOR MINOR

Material and workmanship

Any component part omitted, distorted, full, tight, or twisted 107 Not functioning properly, or defective 108 Any part caught in any unrelated stitching. 109 Cloth Material:

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

Shell material not properly backed with waterproofing layer. 111 Leather:

Not specified color 112 Not full grain 113 Flesh side not smooth or contains area of coarse, loose fibers 114 Not clean, stain or foreign matter 207 Hard, boney, loose, spongy leather, hard scar 115

Cut or hole. 116 Seam (defect affecting appearance or serviceability)

Not specified type 117 Puckered, distorted, pleated, wavy, twisted, irregular or open 118 Loose or tight stitch tension, broken or missing thread or stitch 119

Needle cutting, needle chew, visible mend 120 Edge or raised stitching sewn too close to edge resulting in damage to cloth

Seam allowance not as specified 122 Visible raw edge 123 Any visible perforations from removed stitches 208 Bartacks missing, insecure, misplaced, not specified size, stitches loose or broken, bartack not serving intended purpose.

Front and back of mitten uneven by more than 1/2 inch at hem 125 Unwanted permanent fold, pleat, or crease in fabric or mitten, affecting appearance or serviceability

Labels Omitted, incorrect, illegible, not attached where specified 209 Bar-codes omitted, not readable by scanner 210 Human-readable interpretation (HRI) omitted or illegible 211 Bar code not visible on folded, packaged item; bar code attachment causes damage to the item.

Packaging Not packaged in accordance with the contract or purchase order 213

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

VII.

4.5.3 Leather testing. The leather (see 3.4.2) shall be tested for characteristics listed in table X. The methods of test shall be as specified in table X. All test reports shall contain the individual values utilized in expressing the final results. The testing requirements and test sampling plan shall be as specified in the contract or purchase order.

TABLE X. Leather tests.

Characteristic Requirement Paragraph Test Method

Thickness, ounces Table I ASTM D 1814 Moisture Vapor Transmission Rate, grams/square meter/24 hours (minimum) Table I ASTM D5052

Water Absorption Resistance, percent absorption (maximum) 1/ Table I see 4.6.1 Oil and Stain Resistance, Grade (minimum) Table I AATCC TM118 Abrasion Resistance at 1000 cycles with CS-10 wheel and 500gram load Table I ASTM D7255 Stiffness, degrees (maximum) 1/ Table I ASTM D2821 Stitch Tear, pounds (minimum) 1/ Table I ASTM D4705 Elongation at 25 pound load, percent, (maximum) 1/ Table I ASTM D2209 Shrink Temperature, degrees Celsius (minimum) Table I ASTM D6076 Veslic Rubbing Abrasion, 80 cycles 2/ Table I ISO 11640 Cold Crack Resistance, degrees Celsius Table I ASTM D1912 Finish Adhesion, Newtons/10 millimeters, dry & wet (minimum) Table I ISO 11644 Flexibility and Adhesion of Finish at 30,000 cycles, degrees Fahrenheit Table I ASTM D6182 Hexane Soluble Material, percent (maximum) 3/ Table I ASTM D3495 Chromic Oxide, percent (maximum) 3/ Table I ASTM D2807 pH value (minimum) Table I ASTM D2810 Total ash, percent (maximum) 3/ Table I ASTM D2617 Determination of Chromium (VI) Content, mg/kg Table I ISO 17075

FOOTNOTES:

1/ Eighty percent (80%) of tested samples required to pass.

2/ Value given using the AATCC Grey Scale.

3/ Calculated on moisture-free basis.

TABLE XI. End item testing.

Characteristic Requirement Verification Clo (Dry thermal insulation) value 3.5 see 4.6.2

Whole Glove Leak Test

OR

Overall Liquid Integrity

3.5 see 4.6.4

NFPA 1971

Liner Retention 3.5 see 4.6.3

4.6 Examinations and tests.

4.6.1 Water Absorption Resistance Test. One 3-inch diameter specimen shall be tested from each 12 by 12 test area.

Prior to testing, the specimen shall be allowed to reach moisture equilibrium in the standard conditions environment. A stainless steel 500 mL, 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 g) and then shall be placed inside the cover with the flesh side of the specimen next to the inside of the cover. Place the rubber gasket inside the cover and against the grain surface of the leather specimen. Add 100 mL of distilled or deionized water at 23°C to the container. Secure the cover with the specimen and gasket to the container. Invert the container so the water is against the grain surface of the specimen. Place the inverted container on a flat surface and allow it to remain in the inverted position for 30 minutes.

At the end of 30 minutes place the container upright, remove the cover, and place in on a flat surface. The inside of the cover shall face the flat surface. Tilt the cover so the outer edge of the bottom is raised 1 to 1-1/2 inches from the flat surface, and allow it to drain for 5 minutes. After 5 minutes immediately remove the specimen from the cover, hold the specimen by its edge and shake briskly once to remove any free moisture from the surface of the specimen.

Immediately reweigh the specimen to the nearest 0.01 g, and calculate the percent water absorption as follows:

Percent water absorption = ((W2 – W1) x 100) /W1, where:

W1 = Original weight of conditioned specimen.

W2 = Weight of specimen after being subject to water.

4.6.2 Thermal insulation test. Three separate samples of the test handwear item shall be evaluated and the average value is reported. R values can be converted to the more familiar clo unit 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 7 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 (±0.5)°C and the surface of the hand model is controlled at 35°C. The relative humidity shall be 50% and wind speed shall be maintained at 0.4 meters/second. Total thermal resistance (R) to heat exchange is calculated in the test conditions in the table below and using:

R= (SA* delta T)/Power, where:

R is the thermal resistance, m2 °C/Watt SA = total surface area of 7 regional segments, m2 Delta T = temperature gradient between the hand model surface and ambient air temperature, °C.

P = Total power input, Watts.

If required, mittens 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.

4.6.3 Liner Retention Test and Testing apparatus. Liner retention shall be evaluated with the use of locking forceps and a force-measuring gage. Test a minimum of three finished items. Each digit of the glove/mitten shall be tested as follows. The locking forceps shall be attached to the inner liner of the digit to be tested ensuring that an unattached liner or the outer shell is not grabbed. The hook of the force gauge shall be looped around the locking bridge of the forceps. The digit of the glove/mitten shall be gripped ensuring the inner liner is not impeded. The force gauge shall be pulled until the 6 pound (threshold requirement) and 8 lb (objective requirement) registers on the dial and then released.

Each digit shall be inspected for indication of detachment of inner barrier liner. Results shall be recorded and reported as pass or fail. Failure of any digit of any glove/mitten shall constitute failure. Items shall be permitted to be cut open to verify detachment.

4.6.4 Whole glove leak test. The finished mitten shell shall be tested for leakage in accordance with 4.6.4.1 and

4.6.4.2. The lot size shall be expressed in units of mittens. The sample unit shall be one mitten, and the selection shall be by pairs. Any test failure shall be cause for rejection of the lot.

4.6.4.1 Testing apparatus. The test apparatus shall be capable of holding a measurable amount of water forming a reliable seal at the cuff, have a means of introducing a metered amount of pressurized air into the interior of the mitten with controllable relief valves and tubing and the ability to see the entire glove throughout the test. A known source for a test fixture that meets these requirements is provided in 6.5.13. Before use of an equivalent to the known apparatus mentioned above, the fixture shall be qualified by US Army, Natick Soldier Center.

4.6.4.2 Testing procedure. The mitten shall be inserted into the test chamber to near the cuff. The plug shall be inserted into the cuff of the mitten and clamped such that a seal that holds not less than 4 psi is formed with the beveled edge of the test chamber. Air shall be provided to the chamber to a level of 2 psi for a period of not less than 5 seconds.

Appearance of air bubbles at 5 seconds constitutes failure.

4.6.5 Spectral reflectance test. Spectral reflectance data shall be obtained from 600 to 860 nanometer (nm) at 20nm intervals on a spectrophotometer relative to the polytetrafluoroethylene (PTFE) 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 nm at 860 nm. 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 CIE Source A or CIE Source D65. The specimen shall be viewed at an angle of no greater than 10º from normal, the specular component included. Measurements shall be taken on a minimum of two (2) different areas and the data averaged. The specimen shall be measured as a single layer backed with three (3) 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 yarns. 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 one

(1) percent and wavelength accuracy within two (2) nm. Any color having spectral reflectance values falling outside the limits at four (4) or more of the wavelengths specified shall be considered a test failure.

4.6.6 Visual shade matching. Samples will be viewed using AATCC EP9, Option C (see 6.4), with sources simulating artificial daylight D75 illuminant with a color temperature of 7500K (±200) illumination of 100 (±20) foot candles, and shall be a good approximation to the standard sample under incandescent A illuminant with a color temperature of 2856K (±200).

5. PACKAGING

5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or order (see 6.1). 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 Acquisition requirements. Acquisition documents should specify the following:

a. Title, number and date of this document, including any amendments.

b. Sizes required (see 1.2).

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

d. Applicable Government patterns and drawings, including revisions.

e. When first article sample is required (see 4.3 and 6.2).

f. Number of first article inspection samples (see 4.3.1)

g. Conformance inspection acceptance quality limits (AQL) (see 4.X)

h. Packaging requirements (see 5.1)

6.2 First article. When first article inspection is required, the contracting officer should provide specific guidance to offerors whether the item(s) should be 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 4.3. 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 which 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.

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

6.4 Visual shade matching. In 2019, Option A of AATCC Evaluation Procedure 9, Visual Assessment of Color Difference of Textiles was changed to Option C. NOTE: In case of confusion, the viewing geometry should be “The specimen plane and illumination source will be parallel to each other and aligned so that the light flux is incident at the center of the specimen plane, which is set at a 35 (±5) 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 Sources of supply.

6.5.1 Basic material. 70 denier nylon taslan (3.4.1) has been shown to meet the requirements of this specification. A known source of this material is:

Brookwood Companies, Inc.

485 Madison Avenue, Suite 500 New York, NY 10022 Tel: 212-551-0100 Fax: 646-472-0294 https://www.brookwoodcos.com/

6.5.2 Lining material, gauntlet. 70 denier nylon ripstop (3.4.3) has been shown to meet the requirements of this specification. A known source of this material is:

Brookwood Companies, Inc.

485 Madison Avenue, Suite 500 New York, NY 10022 Phone: 212-551-0100 Fax: 646-472-0294

6.5.3 Insulation. Known sources that meet the requirements of the material specified in 3.4.4 are:

3M™ Thinsulate™ Insulation Type C.

3M 3M Center St. Paul, MN 55144-1000 1-888-364-3577 https://www.3m.com/

PrimaLoft Silver Insulation.

PrimaLoft Ph: 518-213-9073 https://www.primaloft.com

Climasheild.

641 Northpark Drive Clinton, TN 37716 Ph: 865-463-6184 Fax: 865-463-6188 https://climashield.com https://www.3m.com/

6.5.4 Buckle. High release lock, style # 94579 HRL (3.4.7) has been shown to meet the requirements of this specification. A known source of this material is:

American Cord & Webbing Co., Inc 88 Century Dr.

Woonsocket, RI 02895 Phone: 1-401-762-5500 https://acw1.com/

6.5.5 Adjustable lanyard. Style #5639 (3.4.8) has been shown to meet the requirements of this specification. A known source of this material is:

Gladding Braided Products, Inc.

110 County Route 13A South Otselic, NY 13155-0164 Phone: 315-653-7211 Fax: 315-653-4492 https://gladdingbraid.com/contact/

6.5.6 Barrel lock. Barreloc Cordloc (3.4.8.1) has been shown to meet the requirements of this specification. Known sources of this component are:

ITW Nexus (P/N Toaster Ellipse Cordloc 350-2000).

21601 South Harlem Avenue Frankfort, IL 60423 Phone: (708) 720-3025 Fax: (708) 720-2612 http://www.itwnexus.com/

YKK-USA (I/C 0089716)

1850 Parkway Place Suite 300 Marietta, GA 30067, US https://ykknorthamerica.com/

6.5.7 Elasticized Draw Cord. 1/8 inch Elastic Cord, Part #CORD-SHK-125-DLK (3.4.10) has been shown to meet the requirements of this specification. A known source of this component is:

Hi-Tex Corporation 16110 Woodinville-Redmond Road NE Woodinville, WA 98072 Tel: (800) 286-0659 Fax: (425) 488-3567 info@hitexcorp.com

6.5.8 Cord lock. Cyberian cord lock, part # 350-8200-5614 (3.4.11) has been shown to meet the requirements of this specification. A known source of this component is:

ITW Nexus 21601 South Harlem Avenue Frankfort, IL 60423 Phone: (708) 720-3025 tel:14017625500 https://gladdingbraid.com/contact/ http://www.itwnexus.com/ https://ykknorthamerica.com/ mailto:info@hitexcorp.com

6.5.9 Cord End. Zipper pull, style # ZP Wide 99540 (3.4.12) has been shown to meet the requirements of this specification. A known source of this component is:

American Cord & Webbing Co., Inc 88 Century Dr.

Woonsocket, RI 02895 Phone: 1-401-762-5500

6.5.10 Clasp. Center Release Buckle, Part #1002-0038 (3.4.13) has been shown to meet the requirements of this specification. A known source of this component is:

ITW Nexus 21601 South Harlem Avenue Frankfort, IL 60423 Phone: (708) 720-3025

6.5.11 Whole Glove Leak Tester. A Whole Glove Leak Tester (4.6.4.1), covered by US Patent 4,776,209, is available from W.L. Gore and Associates.

W. L. Gore & Associates, Inc.

555 Paper Mill Road Newark, DE 19711 www.gore.com

6.6 NFPA 1971 Standard. It is recommended that the 2000 edition, Chapter 6-33 “Overall Liquid Integrity Test One” for the cited test (see Table XI).

6.7 Subject term (key word) listing.

Cold-weather Handwear Shell Taslan tel:14017625500 http://www.gore.com/

FIGURE 1. Palm View.

FIGURE 2. Back of Hand View.

FIGURE 3. Measurement A.

FIGURE 4. Measurement B.

FIGURE 5. Measurement C.

FIGURE 6. Measurement D.

FIGURE 7. Measurement E.

FIGURE 8. Measurement F.

FIGURE 9. Measurement G.

FIGURE 10. Measurement H.

FIGURE 11. Measurement I.

FIGURE 12. Measurement J.

CONCLUDING MATERIAL

Custodian: Preparing activity:

Navy – MC Navy – MC

Review activities:

Army - GL Air Force - 11

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.

https://assist.dla.mil/