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.

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.

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.