Designed for an aerodynamic fit, protection without weight, street wear and multi-sport. Powered by Thorlo® Thor-Wick® Cool fiber in the ball and heel pads provides enhanced moisture management and protection from shear and impact. Experia® eliminates all but the most essential padding, significantly reducing the weight of the sock. Lightweight Achilles tendon pad protects against rubbing and chafing, while functioning as a heel lock. Ultra lightweight sock frame. Nylon-covered Lycra® provides contoured aerodynamic glove-like fit. Mesh polyester for maximum breathability. Ankle sock. Fiber content: 65% Thor-Wick Cool fiber, 20% polyester (Pink does not have polyester), 14% nylon (Pink has 34% nylon), 1% elastic.