Wigwam Merino Comfort Hiker F2322 Sock 67% Merino wool, 21% Stretch Nylon, 7% Elastic (rubber), 5% Acrylic Made in US Handcrafted with Pride in Sheboygan, Wisconsin, USA since 1905 Merino Wool Durable No Itch No Shrink 62% Merino Wool, 34% Stretch Nylon, 2% Polyester, 2% Spandex Lifetime Warranty