Socks made by Conscious Step help people, animals and the environment. The purchase of each pair works with a partner to help the environment. Socks that Provide Relief Kits- Supports disaster relief around the world by supplying water kits, mosquito nets and hygiene sets to those most vulnerable in the time of greatest need though Oxfam. These are size large which 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.