Socks made by Conscious Step help people, animals and the environment. Each pair works with a partner to make a difference in people’s lives. Socks that fight cancer partners with the leukemia and lymphoma society to fund research on cutting edge cancer cures. Large fits USA Men's 8-13, USA Women’s 9-14. The socks are made of 75% Organic Cotton, 23% Polyamide, 2% Spandex and have a seamless toe. Machine wash warm and lay flat to dry.