Wigwam Men's Dri-Release Ironman Thunder Pro Low Cut Socks 56% Dri-release Tencel (88% Polyester, 12% Tencel), 25% Nylon, 17% X2O Acrylic, 2% Stretch Polyester Made in USA Ultimax Pro...dry feet, no blusters, no odor Dri-release dries super fast and contains FreshGuard odor defense Foot hugging fit and comfort, Heel tab reduces slippage Lightweight instep, Cushioned sole, Seamless toe close Machine Wash Safe