ScentLok Men's Full Season Socks 36% Polyester/35% Acrylic/24% Scent-Lok Polyester/3% Nylon/2% Spandex Made in US Made in the USA Treated with a silver ion antimicrobial to help prevent the growth of odor causing bacteria Moisture-wicking treatment helps wick sweat away from your feet 42% Wool, 33% Cocoa, 18% Nylon, 5% Polyester, 2% Spandex