Worn by NASA astronauts since 1982, these leather suede-soled socks are better known to the earthbound as a staple of wintertime comfort. The warmth and durability of twisted New Zealand wool yarn hug the foot from toe to the mid-calf. Further cushioning and insulation from cold wood or tile floors are provided by the memory-foam midsole and cow suede leather outsole with leather sidewall. Imported. Hand-wash cold, air-dry. Gray. Unisex Sizes.