Fox River Wick Dry Triathlon Ankle Socks 65% Coolmax Polyester, 33% Nylon, 2% Spandex Made in US High-tech socks are light on weight and heavy on performance 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 Cushioned sole and toe absorb shocks