Sierra Socks Women's Bamboo Low Cut Shortie 1-Pair or 3-Pair Pack Socks 2104 85% Rayon from Bamboo, 13% Nylon, 2% Spandex Machine wash warm, Tumble dry low Rayon from Bamboo, Great Hand Extra smooth toe seaming. Almost non existent. No irritation along the toe ridge line. Rayon from Bamboo is great at wicking away moisture from body Naturally Anti-bacterial & Anti-microbial. Shortie, Low Cut, Reaches mid calf. US Shoe Size 4-10