Stay comfortable in any environment with the PowerSox Power-Lites Crew Sock. This high-performance sock is made from 71% polyester/18% acrylic/8% nylon/3% spandex, for maximum comfort and flexibility. Strike zone cushioning provides shock absorption in the heel and ball strike zones in order to minimize foot fatigue. The Comfort Y Heel fit keeps socks in place to prevent shifting and rubbing. AquaFX moisture management wicks away sweat, for dry feet that will be comfortable all day long, while ventilation panels help prevent sweating and keep your feet cool.