The polypropylene undershirt and drawers are new ECWCS development items. 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.
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 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 M-1950 winter undershirt and drawers serve as inner layer in cold-wet and cold-dry climate.
The M-65 cold weather undershirt and drawers serve as inner layer in cold-wet and cold-dry climate.
The mesh cold weather undershirt is part of a base layer set intended for use with the cold weather clothing layering system worn by personnel of the United States Marine Corps.
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 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 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.