Darn Tough Vermont Men's Coolmax Boot Full Cushion Hiking Socks Coolmax 41% / Nylon 27% / Acrylic 26% / Lycra 5% / Other Fiber 1% Made in US 41% Coolmax Polyester, 27% Nylon, 26% Acrylic, 5% Lycra Spandex, 1% other fiber Made in the USA