Made from Thermolite these women's 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. Women's fit 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 70% Thermolite® EcoMade Polyester, 25% Nylon, 3% Polyester, 2% Spandex Style #5543