Our all-time best-selling sock in our most popular design, these black knee-high compression socks are a timeless classic to stock up on! Also available in Wide-Calf sizes. This knee-high Marathon sock offers true graduated compression, increases blood flow, and allows you to perform at your peak, recover faster and feel better sooner. Our advanced design supports critical muscles and tendons, and our proprietary blend of materials wicks moisture for a comfortable fit that goes the distance.