Browning All Season Boot Sock is crafted of 80% Ultraspun Polyester, 17% Nylon and 3% Spandex. They feature Ultra-Dri Moisture Wicking Enhanced Performance for Cooler, Drier Comfort. Sock Size Large (10-13). Men's Shoe Size 9-13, Women's 9-12. Comes in 3 Pack with Black, Blue and Brown. Made in the USA.