DexShell Waterproof Camouflage Socks 24% nylon Imported Tumble Dry Low. Do not twist. Do not iron. Outer: 96% Nylon, 3% Elastane, 1% Cuff Elastics Interlining: 100% Waterproof and Windproof Porelle(R) Membrane Inner: 38% Merino wool, 38% Anti-pilling acrylic, 24% Nylon Mid-calf length Seamless construction for the highest comfort