wigwam men's/women's subzero crew socks, pair wigwam experience superior insulation and moisture management in wigwam men's / women's subzero crew socks these crew socks deliver unmatched insulation without the bulk, thanks to a combination of wool and hollofil?« polyester. hollofil fibers have a hollow core of trapped air that makes them thicker, fluffier and warmer than solid-core fibers of the same weight. plus, wool, the original easy-care fiber, is naturally wrinkle resistant, colorfast, resilient and breathable. it also absorbs moisture to keep feet dry...