Embedded arch support. Strategic mesh panels for improved breathability. Targeted underfoot and ankle cushioning for enhanced performance and comfort. No-slip grip on the bottom helps keep your socks in place. Shaped heel for a contoured fit. Left / right specific construction for better fit. Anti-odor technology helps prevent odor in the sock. Material wicks sweat and dries fast. 68% polyester, 15% cotton, 14% nylon, 3% spandex.