Content: 80% Rayon (bamboo), 17% Nylon, 3% Lycra-Spandex * 3 Pack (ORDER 2 FOR FREE SHIPPING) * Rayon- Natural, Renewable, Biodegradable, Anti-microbial / Natural Deodorizer * Light Weight Construction - Very thin sock ideal for summer! * Hypoallergenic - Great for people with allergies to synthetic fibers!