Silk Weight thermal Underwear top are level 1 of the E.C.W.C.S. system. Made of jersey knit fabric it helps provide extra warmth in cold climates. silk weight thermal underwear is highly breathable, with moisture-wicking properties
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These Level 1 E.C.W.C.S. Generation III, silk-weight long john thermal long underwear keep our soldiers warm when they are on duty, so you know
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