Socksmith writes, "A classic pair of fruit socks for your wardrobe. We can't speak for the fruit in the design, but this pair of bamboo socks is free of toxic chemicals (certified by OEKO-TEK®)." Accredited by the Forest Stewardship Council® for partnering with responsibly managed forests. Certified by OEKO-TEX® Standard 100 for zero harmful substances present. Made using rayon from bamboo for a super-soft sock. Blended with nylon for durability and spandex for flexibility. Moisture wicking and great for sweaty feet. Kind to sensitive skin. 65% Rayon From Bamboo, 33% Nylon, 2% Spandex. Fits womens shoe size 5-10.5.