HILLY Size Chart A cushioned, low cut, high performance running sock with Coolmax(R) fibers for great breathability and ventilation to keep your feet dry, helping prevent blisters. Added cushioning absorbs shock. The perfect socks for high impact sports such as racquet sports and running. Features: - Total cushioning - Wicking Coolmax yarns prevents blisters - Ventflex panels for improved breathability - Arch grip and 'Y' heel for optimum fit - Flat toe seam - Fiber Composition: 86% Polyester (COOLMAX(R) EXTREME PERFORMANCE), 12% Polyamide, 2% Elastane (LYCRA(R) SPORT)