These men's warm winter Carhartt socks are designed to fit under winter boots. They are made from a cozy wool blend and feature full cushioning to keep you comfortable on your feet. . . . 67% acrylic, 17% wool, 8% polyester, 7% nylon, 1% lycra spandex. Fully cushioned foot and lower leg. Non-terry vamp reduces irritating bulk. Machine washable.. Imported.