Meet Your New Favorite Socks People can&&';;t stop raving about these socks (just check the nearly 800 5-star reviews). The Ultimate Bison Wool Socks are the coziest, warmest, and softest socks we&&';;ve ever made-thanks to our BisonShield(TM) fiber. This unique fiber is crafted from salvaged bison wool, intercepted from the waste stream, giving you unmatched comfort while being gentle on the planet. It&&';;s the sock that hugs your feet and your eco-consciousness. Why You&&';;ll Love Them Plush cushioning with reinforced heel and toe for extra durability Ribbed arch support for a secure, snug fit Bison wool naturally regulates temperature and wicks moisture, keeping you warm without overheating Made with a commitment to sustainability right here in the USA Materials: 62% wool, 22% nylon, 15% bison wool, 1% spandex Small fits W 6-10, M 5-8 Large fits W 10-13, M 8-12