50.5% COOLMAX, 15.9% Polyester, 14.3% Nylon, 12.1% cotton, 7.2%LYCRA Imported Machine Wash Moisture Wicking & Anti-Odor COOLMAX Fiber: These sweat releasing crew running socks are made of CoolMax and nylon mesh ventilation in the feet arch providing quick moisture wicking which reduces heat and sweat moisture absorption. Sweat-wicking fiber that provides superior breathability, freshness, and dryness. These dry feet socks drain excess heat and sweat from the skin to the material surface for quick evaporation. Considerable Elasticity: AKASO crew athletic socks for men and women made with high-elastic Lycra fiber have excellent ductility for improved comfort, durability, and shape retention. The unique design ensures these comfortable socks fit well, helping you run better. No slipping and anti-blisters: These running socks imported from Italian machines are used to stitch the toe seamlessly. With Y-shape support at the heel and arch of the feet, hug your feet comfortably and stay in place well. For a better fit with less friction, a left-right foot distinguishable design is chosen. Seamless integrated molding: Imported Italian machines are used to stitch the toe seamlessly. This allows the sock to wrap your feet in comfort while reducing friction. The height of the sock and the double-layer design of the top prevent socks from slipping down and stretching out of shape. AKASO unisex running socks size chart: Small: shoe size 6-8, Medium: shoe size 8-10, Large: shoe size 10-12, X-Large: shoe size 12-14.