Sockwell Men's San Marco Socks Wool 43% / Bamboo Rayon 43% / Nylon 12% / Spandex 2% Made in the USA and Imported 43% Merino Wool/43% Bamboo Rayon/12% Nylon/2% Spandex Flat Toe Seam True Rib Construction Machine washable, no bleach Made in the USA