Enjoy these beautiful monarch butterflies gliding through the air, covering thousands of miles on their great migration, and landing straight onto your socks! Every pair of Socksmith bamboo socks features a seamless toe for ultimate comfort. Bamboo rayon is soft, luxurious, breathable, and antimicrobial. Women’s Shoe Size US: 5-10.5. 66% Rayon From Bamboo, 32% Nylon, and 2% Spandex.