The t-shirt shall have short sleeves, a crew neck collarette that shall finish 3/4 + 1/8 inch wide. The sleeve and bottom shall be hemmed approximately 3/4 inch from edge. All seams shall be overedged or cover stitched. The color shall be Olive Drab.

The All Purpose Environmental Clothing System (APECS) parka and trousers were developed to provide Marines with an all-purpose/all-season set of outershell garments that are lighter in weight, lower in bulk, have lower noise generation, are moisture vapor permeable and have an improved water repellency over the 2nd Generation ECWCS parka and trousers. The APECS also incorporates the Marine Pattern.

In an effort to meet its ever changing environmental challenges, The Marine Corps has identified a need for a Combat Desert Jacket (CDJ) that will provide protection from the unique environmental nature of the desert.

The Combat Woodland Jacket (CWJ) is a woodland version of the combat desert jacket.

The All Purpose Environmental Clothing System (APECS) parka, together with APECS trousers, was developed to provide Marines with an all-purpose/all-season set of outershell garments that are lighter in weight, lower in bulk, have lower noise generation, are moisture vapor permeable and have an improved water repellency over the 2nd Generation ECWCS parka and trousers. The APECS also incorporates the Marine Pattern.

The fleece pullover was developed to provide The Marine Corps with a multi-purpose, lightweight/low bulk, moisture transport, and insulation layer for the upper torso.The fleece pullover can be used during both garrison and field duties in cool to cold weather conditions.It can be worn under the camouflage utilities, used as a sleep shirt in the sleeping bag, and as an optional/additional insulation layer for the ECWCS.

The extended cold weather parka and trousers are new ECWCS development items.The parka and trousers serve as the windproof, waterproof layer in the system.

The cold weather field coat liner and trouser liner serve as an insulating layer for the ECWCS.

The extended cold weather parka is a new ECWCS development item.The parka serves as part of the windproof, waterproof layer in the system.

The polyester fiberpile shirt serves as the primary insulating layer on the upper body.The bib overall is used as an additional layer for temperatures below -25°F (-32°C) and down to -60°F (-51°C).

The underwear layer next to the skin acts as a moisture wicking layer and serves to draw moisture away from the skin, transferring it to the outer layers of the system.

The 2nd generation parka and trousers incorporates features requested by Marines. Improvements over the original parka and trousers include a two-way entry pocket design, water channels to protect critical area from potential leakage, removal of the taffeta nylon lining to reduce cost, improved breathability, a roll and stow hood, and a Cordura nylon reinforcement of the elbow and knee areas to improve durability.

The parka and trousers replace the original parka and trousers in the Army.

The shirt and overalls replace polyester fiberpile shirt and bib overall.

Lightweight Cold Weather Underwear Set (LWCWUS) was developed to provide a moisture wicking, heat retentive, lightweight garment for moderate conditions not sufficiently cold for the polypropylene underwear.

The undershirt and drawers are designed to be worn next to skin by itself and to transfer moisture from the skin to the outside of the fabric where it spreads rapidly for quicker evaporation.

The shirt and drawers are designed to provide light insulation for use in mild climates as well as a base layer for colder climates, worn next to skin by itself or in conjunction with other levels (level I) for added insulation and to aid in the transfer of moisture.Fabric is slightly different than level I in that it provides extra warmth but still wicks moisture away from the skin to allow for quicker evaporation.

The jacket is designed to act as the primary insulation layer for use in moderate to cold climates.It is also approved to wear as an outer garment.The jacket creates air pockets that trap air and retain body heat providing outstanding warmth without weight.This comfortable garment offers excellent breathability, dries quickly and provides environmental protection while maintaining low bulk and durability.

The wind jacket is designed to act as a low volume shell layer in transitional environments to provide wind and sand protection, optimizing the performance of moisture wicking along with insulation layers when combined with body armor or the Army Combat Uniform.

The jacket and trousers are designed for use in moderate to cold weather conditions as a soft shell layer combined with other base and insulative layers.The jacket and trousers provide light weight, low bulk and extreme comfort for movement.

The jacket and trousers are designed for use in cold, wet conditions alternating between freezing and thawing as a hard shell layer combined with other base and insulative layers.The jacket and trousers provide a lightweight, completely waterproof, windproof and breathable level of protection against the elements.

The parka and trousers are the outermost level of protection in the system designed for use during static operations in extreme cold, dry conditions.

The LEP layer 1 silkweight undershirt and drawers are intended for wear as a moisture wicking layer of the ECWCS.

The LEP layer 2 midweight undershirt and drawers are intended for wear as an insulation layer of the ECWCS.

The LEP layer 4 fleece jacket is fabricated in a heavyweight fleece fabric. It has a collar, zipper front closure, pit zips, two zippered hand warmer pockets, inner pockets and a windproof front and back yoke.

The LEP layer 5 wind resistant fleece jacket is fabricated in heavyweight fleece wind resistant fabric. It is the same basic design as the layer 4 heavyweight fleece jacket with the addition of wristovers and a hood.

The M-1950 field jacket ensemble is made up of a shell and a detachable mohair frieze liner which is attached inside the shell for extra warmth.

The M-1950 snow camouflage parka is intended for wear as an outer garment to provide camouflage in snow areas. The parka is intended for camouflage only and is not a substitute for outer garment.

The M-1950 winter underwear serves as inner layer in cold-wet and cold-dry climate.

The M-1951 field jacket (later redesignated coat) ensemble is made up of a shell and a detachable mohair frieze liner which is attached inside the shell for extra warmth.The jacket ensemble is worn directly over the intermediate layer in cold weather.

The M-1951 parka ensemble is made up of a shell and a detachable mohair frieze liner which is attached inside the shell for maximum insulation.The parka ensemble is worn as an outer garment of the cold-dry uniform with a fur-ruffed hood for added head protection and may be worn over the coat.

The wool field shirt is intended for wear as a component of the cold-wet and cold-dry uniforms for temperate and cold areas.

The M-65 cold weather field coat serves as outer layer in cold-wet climate or as intermediate layer in cold-dry climate. It can be worn with a button-in liner for extra warmth and with a fur-ruffed hood for increased head protection.

The M-65 cold weather field coat liner is buttoned into the coat for extra warmth, and also can be worn as a separate button front liner to serve as an insulating layer for the ECWCS.

The M-65 extreme cold weather parka ensemble is made up of a shell and a button-in quilted liner which is attached inside the shell for extra warmth. The parka ensemble is worn as an outer garment in cold-dry climate with a fur-ruffed hood for increased head protection.

The M-65 cold weather underwear serves as inner layer in cold-wet and cold-dry climate.

The ECW parka and trouser overgarments and booties are designed for biouvac, rest and sentry activities in mountain conditions.The garments shall be lightweight and easily packed to a minimum volume to be carried among the variety of other mission essential gear.

The windpro fleece jacket is intended for wear by male and female military personnel of the USMC in mountainous and cold weather environments.It will provide improved wind resistance, breathabilty and water repellency when worn in intermediate to cold weather environments.It will be part of the Mountain/Cold Weather Clothing System and will replace the current fleece jackets.

The lightweight exposure jacket, together with the lightweight exposure trousers, is designed for wind and rain protection in mountain conditions.

The lightweight exposure jacket and trousers are designed for wind and rain protection in mountain conditions.

The ECW parka, together with the ECW trousers and booties, is designed for bivouc, rest and sentry activities in mountain conditions.

The snow camouflage parka, trousers and pack cover are designed to be worn as over-garments when snow camouflage protection is required.

The mid-weight FR grid fleece underwear is a flame resistant version of the polyester grid fleece underwear.It will provide improved moisture management, insulation and comfort when worn in intermediate to cold weather environments. In addition, it will provide Marines with FR protection when needed. The FR Grid Fleece can be worn as part of the Mountain Cold Weather Clothing System or Flame Resistant Organizational Gear (FROG).

The mid-weight grid fleece underwear is intended for wear by male and female military personnel of the USMC in mountainous and cold weather environments.It will provide improved moisture management, insulation and comfort when worn in intermediate to cold weather environments.It will be part of the Mountain/Cold Weather Clothing System and will replace the current polypropylene underwear set, and fleece pullover.

The FR next-to-skin underwear is a flame resistant version of the polyester silkweight underwear.It will provide improved moisture management and comfort when worn in intermediate to cold weather environments. In addition, it will provide Marines with FR protection when needed. The FR Silkweight Underwear can be worn as part of the Mountain Cold Weather Clothing System or Flame Resistant Organizational Gear (FROG).

The new next-to-skin underwear is intended for wear by male and female military personnel of the USMC in mountainous and cold weather environments.It will provide improved moisture management and comfort when worn in intermediate to cold weather environments.It will be part of the Mountain/Cold Weather Clothing System and will also replace the current lightweight CW underwear set.

The FREE system t-shirt and boxer briefs next-to-skin layer is constructed with a tri-blend of lenzing FR rayon fiber, wool, and nylon. This layer is extremely lightweight and breathable to allow high moisture movement and quick drying.

The FREE system undershirt and drawers base layer is constructed with a lightweight moisture wicking and breathable lycra mesh fabric made with DuPont Nomex fiber. This base layer provides maximum comfort and excellent recovery properties in hot climate, and can be worn under other layers like the mid-weight shirt and drawers for additional protection for cold weather.

The FREE system mid-weight shirt and drawers base layer is constructed with a quick-drying, high loft Polartec thermal FR fleece made with DuPont Nomex fiber for optimal warmth and breathability without weight. This fleece layer provides maximum comfort when worn over base layers and underneath the uniform.

The FREE system light weather outer layer (LWOL) soft shell jacket and trousers are constructed with a lightweight, windproof, waterproof, breathable Massif Elements Lite 4-way stretch fabric made with DuPont Nomex fiber. The jacket features high collar for added protection, zippered chest and sleeve cargo pockets, and two flapped double pen pockets. The LWOL jacket is also engineered with an easy-cinch draw cord and adjustable wrist cuffs for variable fit and warmth, a pass-through flap for CVC extraction strap access, and velcro loop for name, rank, flag, and unit tape round out the LWOL's functionality.

The FREE system intermediate weather outer layer (IWOL) jacket, vest and trousers are constructed with an abrasion resistant Massif Elements 4-way stretch fabric made with DuPont Nomex fiber. Its windproof, waterproof, and breathable membrane helps to keep elements out without trapping sweat and soft fleece interior keeps the war-fighter warm and protected from the elements. The IWOL jacket and vest also feature velcro loops for name, rank, flag, and unit tape.

The FREE system extreme weather outer layer (EWOL) parka, fleece liner, and trousers are constructed with a lightweight, windproof, waterproof, and breathable Gore-tex fabric that combines the DuPont Nomex fiber outer material and the Gore-tex membrane. The EWOL jacket features a removable roll-and-stow hood and zip-in liner constructed from Polartec thermal FR fleece. The EWOL serves as the most external layer in the clothing system and is available in OCP or UCP.

The Enhanced Flame Resistant Combat Ensemble (EFRCE) consists of a blouse and trousers that make up a set. Although the EFRCE is similar to the current Flame Resistant Combat Ensemble, the design and fabrics used to construct the ensemble have been modified to increase durability.

The Flame Resistant Combat Ensemble is comprised of a high performance protective blouse and protective trousers that will provide the protection, safety and comfort features required by Flame Resistant Organizational Gear.

The inclement weather combat shirt is a pullover shirt that will provide FR protection as well as protection from wind and water. It is designed to be worn over the combat shirt as a component of FROG.

In addition to being FR, this shirt has a mock neck design for added protection and also contains an antimicrobial property along with moisture management (wicking) capabilities.

The NWU parka fleece liner is an insulation component designed to be worn with the NWU parka and provide extra protection during cold weather conditions. When worn with the parka, it shall be attached to the parka shell via inside front slide fastener and sleeves inserted in the arm openings and secured by snap attachment assembly tab located at the inside bottom of each sleeve. The liner may be optionally worn as a stand-alone outer garment over the NWU shirt.

The NWU parka is intended for use by US Navy personnel when weather conditions dictate and as the outer layer protection when used during cold/wet weather operations.

The Improved Rain Suit (IRS) forms a waterproof outer shell worn over other clothing and gear. It is lightweight; however, IRS functions strictly as a rain barrier, offering little protection from the cold.

Commercial item description A-A-55246 covers the technical requirements for polypropylene undershirt and drawers, components of ECWCS.

Commercial item description A-A-55317 covers a lightweight snow camouflage white parka with a self-storage pouch.

Military specification MIL-C-43455 covers the requirements for one type of a straight front, cold weather, field coat made of water repellent fabrics.

Military specification MIL-C-44048 covers camouflage pattern, single breasted combat coats.

Detail specification MIL-DTL-32157 covers the requirement for APECS parka and a detachable (optional) hood.

Detail specification MIL-DTL-32184 covers the requirement for the Army 2nd Generaton ECWCS parka and the detachable (optional) hood.

Detail specification MIL-DTL-32620 covers a flame resistant (FR), lightweight, cold weather undershirt.

Detail specification MIL-DTL-32625 covers a flame resistant, mid-weight, cold weather pullover shirt.

Military specification MIL-J-10919 covers M-1950 field jacket.

Military specification MIL-J-3001 initially covered jackets made of OD-7 herringbone twill cloth, and then jackets made of OG-107 cotton sateen cloth.

Military specification MIL-J-843 initially covered a modified version of the M-1943 field jacket, and then the M-1950 field jacket.

Military specification MIL-L-10800 covers a mohair frieze liner for the M-1950 field jacket.

Military specification MIL-L-11449 covers a mohair frieze liner for the M-1951 field coat.

Military specification MIL-L-43466 covers the requirements for a button-in insulating liner for the extreme cold weather parka.

Military specification MIL-L-43536 covers an insulating liner for the field coat made of quilted polyester batting material.

Military specification MIL-P-10809 covers a snow camouflage parka made from white quarpel treated cotton/nylon oxford cloth.

Military specification MIL-P-11012 covers a wool liner which is attached inside a parka shell.

Military specification MIL-P-11013 covers the requirements for M-1951 parka shell.

Military specification MIL-P-43496 covers one type of extreme cold weather parka made of cotton-nylon oxford cloth.

Military specification MIL-P-44188 covers a nylon, three-layer laminated, waterproof, and moisture-vapor-permeable parka, a component of ECWCS.

Military specification MIL-S-10858 covers the requirements for a wool/nylon, cold weather field shirt.

Military specification MIL-S-43929 covers polyester/cotton durable press utility shirts.

Military specification MIL-S-44163 covers a synthetic fiber pile shirt used as a component of the ECWCS.

Military specification MIL-U-10211 covers M1950 winter undershirt.

Military specification MIL-U-43262 covers men's cold weather, wool/cotton undershirts.

Military specification MIL-U-44164 covers a polypropylene undershirt used as a component of ECWCS.

Purchase description CR/PD 05-08 covers the requirements for a moisture-wicking t-shirt.

Purchase description GL/PD-06-01 covers the requirements for a lightweight undershirt, which serves as a layer of the GEN III ECWCS.

Purchase description GL/PD-06-02 covers the requirements for a synthetic grid fleece shirt, which serves as a layer of the GEN III ECWCS.

Purchase description GL/PD-06-03 covers the requirements for a fleece jacket, which serves as a layer of the GEN III ECWCS.

Purchase description GL/PD-06-04 covers the requirements for a wind protective jacket, which serves as a layer of the GEN III ECWCS.

Purchase description GL/PD-06-05 covers the requirements for a soft shell jacket, which serves as a layer of the GEN III ECWCS.

Purchase description GL/PD-06-06 covers the requirements for a waterproof, extreme cold/wet weather jacket, which serves as a layer of the GEN III ECWCS.

Purchase description GL/PD-06-07 covers the requirements for an insulated loft jacket, which serves as a layer of the GEN III ECWCS.

Purchase description GL/PD 07-13 covers the requirements for a single-breasted combat coat, a component of the army combat uniform.

Purchase Description GL/PD 14-04 covers the requirements for unisex and female combat coats to be worn by the Army.

Purchase description NCTRF PD 04-09 covers the requirements for the US Navy working uniform parka in desert and woodland camouflage.

Purchase description NCTRF PD 15-06 covers a waterproof, moisture-vapor-permeable parka that accepts a zip-in liner for use by US Navy personnel.

This purchase description covers the requirements for the Marine Corps enhanced flame resistant combat ensemble, blouse and trouser.

This purchase description covers the requirements for the Inclement Weather Combat Shirt (IWCS). The shirt is designed to provide flame resistance and inclement weather protection needed for wear in field and combat operations.

Performance specification MC/PS 01-2015 SYSCOM prescribes the performance requirements and identifies verification procedures for the U.S. Marine Corps flame resistant lightweight cold weather underwear set undershirt.

Performance specification MC/PS 03-2015 SYSCOM prescribes the performance requirements and identifies verification procedures for the US Marine Corps flame resistant midweight cold weather underwear set pullover shirt.

This performance specificaiton covers the requirements for the Marine Corps snow extreme cold weather (ECW) parka and trouser overgarments and bootie for biouvac, rest and sentry activities in mountain conditions.

This performance specification covers the requirements for the Marine Corps lightweight exposure jacket and trousers.