Santa's reindeer are the original "flight club" members—just a bunch of hoofed daredevils ready to rock around the Christmas tree and drop gifts like it's hot. Accredited by the Forest Stewardship Council® for being sourced from responsibly managed forests Certified by OEKO-TEX® Standard 100 for zero harmful substances present Made using rayon from bamboo for a super-soft sock Seamless toe which limits irritation or chafing Blended with nylon for durability and spandex for flexibility Moisture wicking and great for sweaty feet Kind to sensitive skin Care Instructions: Machine wash cold. Do not bleach. Tumble dry low or hang to dry. Fiber Content: 70% Rayon from Bamboo, 28% Nylon, 2% Spandex. Sizing Details: L/XL 10-13 (Women's Shoe Size 10.5+ and Men's Shoe Size 9-13)