Socks made by Conscious Step help people, animals and the environment. These are Socks that help fight cancer and HIV. 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. Socks that promote breast cancer prevention partners with Keep A Breast to support early detection. Socks that treat HIV helps provide 3 days of HIV therapy for women in Africa through UNAIDS. Available sizes vary. 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.