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 All Purpose Environmental Clothing System (APECS) trousers, together with APECS parka, 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.

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

The extended cold weather trousers are a new ECWCS development item.The trousers serve as part of the windproof, waterproof layer in 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 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 M-1943 field jacket is a windproof, water-repellent jacket which is used in temperate and cold climates as the necessary windproof outer shell. It may be worn over a shirt, sweater and pile jacket, or any combination of the three.

The M-1943 MQ-1 field jacket was a modified version of the M-1943 field jacket that contained inner buttons for attachment of a removable liner. The jacket was adopted as the M-1950 field jacket.

M-1948 parka-shell and parka-liner.

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 snow camouflage trousers are intended for wear as an outer garment to provide camouflage in snow areas.

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 M-1951 arctic trouser ensemble is made up of a shell and a detachable mohair frieze liner which is attached inside the shell. The trousers are worn over the field trousers when the soldier must remain inactive (in a listening post, for example) and when temperatures of -50 to -60°F (-46 to -51°C) are encountered.

The M-1951 field trouser ensemble is made up of a shell and a detachable mohair frieze liner which is attached inside the shell for extra warmth. The shell is worn over wool trousers as the outer layer in cold-wet climate or worn with the liner as the intermediate layer in cold-dry climate.

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 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 field trousers serve as outer layer in cold-wet climate or as intermediate layer in cold-dry climate, and also serve as a durable insulating layer of ECWCS to be worn over the liners when the outer extended cold weather trousers are not needed.

The M-65 snow camouflage trousers are intended for wear in cold dry areas as supplimentary trousers with attached liner.

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

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

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

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 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.

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-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.

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

Detail specification MIL-DTL-32158 covers the requirement for APECS trousers.

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

Detail specification MIL-DTL-32185 covers the requirement for the Army 2nd Generation ECWCS trousers.

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

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-P-10402 covers the M-1948 parka shell and liner.

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

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-T-2027 covers snow camouflage trousers.

Military specification MIL-T-43497 covers water repellent sateen trousers with leg cargo pockets.

Military specification MIL-T-43654 covers snow camouflage, white arctic trousers.

Military specification MIL-T-44189 covers nylon, three layer laminated waterproof and moisture vapor permeable trousers used as a component of the 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-06-16 covers the requirements for a soft shell trouser, which serves as a layer of the GEN III ECWCS.

Purchase description GL/PD-06-17 covers the requirements for waterproof, extreme cold/wet weather trousers, which serve as a layer of the GEN III ECWCS.

Purchase description GL/PD-06-18 covers requirements for insulated loft trousers, which serve as a layer of the GEN III ECWCS.

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 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.

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.