DexShell Waterproof Ultraflex Socks 30% nylon Imported Outer: 96% Nylon, 3% Elastane, 1% Cuff Elastics Interlining: 100% Waterproof and Windproof Porelle(R) Membrane Inner: 70% Bamboo rayon, 30% Nylon Ankle length Seamless construction for the highest comfort