TERMOSWED PLUS is an extremely high-quality, two-layered undergarment with excellent fit. The fine rib polypropylene terry cloth inner absorbs moisture and wicks it away from the skin. The cotton outer absorbs the moisture and moves it on to the next clothing layer (e.g. fleece). This keeps the body warm and dry. The fabric weighs 275g/sqm and is made of 66% polypropylene, 25% cotton and 9% nylon. Tested by the Textile Research Institute Hohenstein, Test-No. 87.4.1536.