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.

USMC cold weather cap is not a replacement for the currently sustained USMC microfleece hardface cap but would be worn separately from the current cap when increased protection from wet and dry cold weather environments is needed.

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 Mountain/Cold Weather Clothing System (MCWCS) is a Marine Corps specific cold weather layering system (CWLS), a replacement for the ECWCS.

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 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.

Wear guidance for cold weather clothing fielded by the Program Manager, Infantry Combat Equipment, Marine Corps Systems Command (PM ICE, MARCORSYSCOM).

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

The hardface micro fleece cap 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, durability and water repellency when worn in intermediate to cold weather environments.It will be part of the Mountain/Cold Weather Clothing System and will ultimately replace/phase out the current micro fleece caps.

The light duty flame resistant glove insert is designed to be worn either alone or under a mitten or glove shell.

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 Marine Corps has developed an Extreme Cold Weather Mitten System including a Mitten Shell with Removable Liner and Light Duty Flame Resistant Glove Insert, which will provide improved environmental protection over USMC's previous mitt, the insulated trigger finger mitt.

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 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.