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

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.

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

Detail specification MIL-DTL-32621 covers flame resistant, lightweight, cold weather drawers.

Detail spcification MIL-DTL-32624 covers flame resistant, mid-weight, cold weather drawers.

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

Purchase description MC/PD 04-2011 SYSCOM covers the requirements for the U.S. Marine Corps cold weather cap.

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 02-2015 SYSCOM prescribes the performance requirements and identifies verification procedures for the U.S. Marine Corps flame resistant lightweight cold weather underwear set drawers.

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.

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 drawers.

This performance specification covers the requirements for the Marine Corps Light Duty Flame Resistant Glove Insert which can be worn under a glove or mitten.

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.

This performance specification covers the requirements for the Marine Corps Extreme Cold Weather Mitten System with Insulated Removable Liner.