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.