Military issue undergarment for the Extreme Cold Weather System (ECWS). Lightweight 100% moisture wicking polyester. Absolutely new in original government packaging. Size XL, but is made to be worn tight against the body so it really only fits up to about a size Large loosely as an outer jacket. Features shoulder and elbow patches to protect against premature wear and tear on the pile fabric. Two slash front pockets also. It makes a great jacket by itself even though it is actually a liner for the military goretex shell. Again these are size XL but are close fitting so really only fits up to Large. 42" chest and 6'0" in height maximum.