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 black boot is for wear in cold, wet climates (down to -20°F (-29°C)). The white boot is for wear in extreme cold, dry climates (down to -60°F (-51°C)).

The mountain combat boots are intended for use in rugged, mountainous terrain.

In 1988, the U.S. Army began a program to develop a new combat boot for dismounted soldiers and marines operating in cold and wet environments where the mean monthly temperature ranges between 14°F and 68°F (-10° and +20° C).The new Intermediate Cold Wet (ICW) Boot was designed to fill the protective void between the uninsulated U.S. Army Standard Combat Boot and the highly-insulated Extreme Cold Weather Vapor Barrier Boot.

Army footwear operational view.

The boot socks are anti-microbial, and contain a fiber that is coated in silver to combat bacteria growth that causes odor and stains.

The extreme cold weather mountaineering socks are intended for wear in sub-zero temperatures on rugged terrain.

The socks are seamless, stretch type, with a true or mock rib knit, elastic top, and a plain knit leg and foot with a terry or tuft stitch on the inside of the high heel, heel, sole, toe and ring toe.

The socks are seamless, stretch-type, with a true rib-knit top and a plain knit leg and foot with a terry or tuft stitch on the inside of the high heel, heel, sole, toe and ring toe.

The socks are natural-colored, seamless with a terry or tuft stitch to the inside of the entire sock and a top finished with a nonraveling welt, overedge stitching, or a rib stitch.

Commercial item description A-A-55107 covers nylon cushion sole socks.

Commercial item description A-A-55302 covers one type of seamless wool and cotton winter socks.

Military specification MIL-B-11431.

Military specification MIL-B-2372.

Military specification MIL-B-43154 covers hot weather, combat boots that have a leather and nylon duck upper and direct molded sole.

Detail specification covers the requirements for a Desert Sand-colored Hot Weather Combat Boot for use in both hot weather wet and dry environments.

Military specification MIL-S-405 covers one type of seamless men's wool and cotton winter socks, the inside of which have terry or tuft stitches through-out.

Military specification MIL-S-43823 covers the requirements for a nylon, stretch type, cushion sole sock.

Military specification MIL-S-48 covers wool, nylon and cotton, stretch-type, cushion sole socks.

Purchase description CR/PD 03-18 covers the requirements for boot socks that incorporate antimicrobial properties.

Purchase description GL/PD 08-75 covers the requirements for a Desert Sand-colored Hot Weather Combat Boot for use in both hot weather wet and dry environments.

Purchase description GL/PD 10-01 covers the requirements for a waterproof combat boot for use in rugged, mountainous terrain.

Purchase Description GL/PD 11-01 covers the requirements for a Desert Sand-colored, waterproof, temperate weather combat boot for Infantry, Flight and Combat Vehicle Crewman use.

This purchase description covers the requirements for the U.S. Marine Corps Rugged All Terrain (RAT) Boot Hot Weather.

This purchase description covers the requirements for the U.S. Marine Corps Rugged All Terrain (RAT) Boot Temperate Weather.

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.