Harley-Davidson Mens Mid Calf Vented Performance Warm Riding Socks Black Sock - L - Mens 9-13 100% Acrylic Men's Vented Performance Riding Mid Calf Socks Size Large: Fits Men's shoe size 9-13 Made of 60% Acrylic, 20% Merino Wool, 17% Nylon, 3% Spandex Naturally Moisture wicking premium merino wool Made in the U.S.A