Birkenstock Sydney Boot Socks Size: US Womens 8-11.5; Mens 6-9.5; EU 39-42 Color: Black This casual cotton sock is the height of fashion thanks to its design and boasts a high level of soft, skin-friendly cotton. The fit is enhanced by the pliant cuff and flat toe section. The reinforced toe and heel sections offer lasting comfort by boosting durability and providing the feet with optimum protection. Material: high cotton content Details: elasticated, pressure-free cuff This item is made of: 93% cotton, 5% polyamide, 2% spandex (Lycra)