OUTAD Coolmax Fast Drying Moisture Wicking Athletic Socks 45%?Coolmax Polyester (designed to wick moisture), 45% Cotton, 8% Nylon, 2% Lycra Spandex. Soft and thick while maintaining great breathability. Signature moisture transport design wicks moisture up and out of the shoe, accelerating evaporation. Slip resistant technology utilizes a fiber blend that helps with in-shoe traction. One size fits most - good elasticity. Socks are quarter crew and stop at the lower calf.