Thorlo's Ankle Length Lite Walking Sock Offers the Most Padding in a Lightweight Construction. There's Medium Density Padding in the Heel and the Ball of the Foot For Extra Cushion and Lightweight Padding in the Arch and Across the Top of the Foot for Extra Protection and a Better Fit. A Special Blend of 72% Coolmax®, 26% Nylon & 2% Spandex Fibers Provides The Ulitmate in Moisture Wicking For All Day Comfort. (Sock Size 10 = Mens Shoe Size 6-8, Sock Size 11 = Mens Shoe Size 8.5-10, Sock Size 12 = Mens Shoe Size 10.5-11.5, Sock Size 14 = Mens Shoe Size 12-13.)