Wigwam Men's Ultimax Ironman Thunder Pro Low Cut Multi-Sport Sock 49% Polyester, 25% Nylon, 17% Acrylic, 7% Tencel, 2% Polyester Made in US Machine Wash Made in the USA Ultimax pro, cushioned sole, dry feet Fresh guard odor defence and super-fast drying Heel tab reduced slippage No blisters, no odor