Twin City Baseline Aware Crew Sock 17% nylon Moisture and odor controlling Breathable mesh design Provides Cushioning Small (Men: 3-6 / Women: 4-7), Medium (Men: 6-9 / Women: 7-10), Large (Men: 9-12 / Women: 10-13), X-Large (Men: 12-15 / Women: 13+)