The M-1951 field jacket (later redesignated coat) ensemble is made up of a shell and a detachable mohair frieze liner which is attached inside the shell for extra warmth.The jacket ensemble is worn directly over the intermediate layer in cold weather.
The M-1951 field trouser ensemble is made up of a shell and a detachable mohair frieze liner which is attached inside the shell for extra warmth. The shell is worn over wool trousers as the outer layer in cold-wet climate or worn with the liner as the intermediate layer in cold-dry climate.