These Fox River socks are heavyweight and made from a blend of acrylic and wool to provide the best of both fibers, warmth and durability. The reinforced heel and toe help you get the most miles out of your purchase. Wool is a great material for warmth and odor reduction but the higher acrylic content means this sock is less scratchy than traditional wool socks. Fox River socks are guaranteed against manufacturing defects for 1 year and are proudly made in America. Specs: 62% acrylic, 20% stretch nylon, 17% worsted wool, 1% spandex