Nike Elite Anti-Blister Running Sock Large Low-friction construction reduces abrasion over the heel and toes. Y-stitch heel pocket for a comfortable fit. Arch support for a snug, secure fit. Mesh panels for enhanced ventilation Reinforced heel and toe for durability in high-wear areas. Left/right-specific for enhanced fit. Size Large Womens US shoe size 10-13, Men's US Shoe Size 8-12, Europe Shoe Size 42-46