This three pack gives access to safe water to one person for 5 years through Water.org. Comes in sizes USA Men's 8-13, USA Women’s 9-14 (Med) OR USA Men's 4-8, USA Women's 5-9 (Small). 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.