Harley-Davidson Mens Over-the-Calf Compression Socks. Black Poly Blend, Large Polyester Blend Men's Extreme Riding Compression Sock Size Large: Fits Men's shoe size 9-13 Made of 70% Ultra Dri Ultraspun Polyester, 27% Nylon and 3% Spandex Compression construction increases circulation Made in the U.S.A