The Drymax Running Lite-Mesh sock has a low profile, highly vented design perfect for running. Its two-layer Drymax construction wicks moisture away from the foot, keeping you dry and helping maintain a constant temperature. A flat toe seam, Y-heel, and anti-slip wedge create a comfortable fit. Features: - Exclusive Color * - Dual layer construction moves moisture away from your feet to keep you dry - Breathable mesh stripe vents - Flat toe seam - Vented arch band - Anti-slip wedge - Y heel - Anti-microbial fibers help prevent odor - Long lasting, abrasion resistant fabric Sizing: - Small: Women's shoe size (5 - 7), men's shoe size (3.5 - 5.5) - Medium: Women's shoe size (7.5 - 9.5), men's shoe size (6 - 8) - Large: Women's shoe size (10 - 12), men's shoe size (8.5 - 10.5) - X-Large: Men's shoe size (11 - 13)