Made from Thermolite these lightweight socks won't add weight and with URfit® System and Wick Dry™ technology it means you're comfortable and dry. Reinforced toe and heel add durability to last longer. You'll love these stylish ski socks. URfit® System provides arch support and memory-knit construction Vented panels remove moisture and keep you dry Reinforced toe and heel add durability and longer sock life Smooth, flat-knit construction provides lightweight comfort Smooth, flat comfort toe seam 58% Thermolite polyester, 39% nylon, 2% spandex, 1% polyester Style #5143