NEW WITH TAGS Introducing our #1 best-selling sock, the Black on Black Marathon. An essential over-the-calf sock to have in your wardrobe! Our Marathon knee-high 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. Why Compression Socks? Enhance circulation and blood-flow Boost peak performance levels Support critical muscles and tendons during exercise Minimize soreness and speed recovery Reduce swelling and fight fatigue Proprietary blend of nylon and spandex. Contains NO Latex, BPA, or PFAS (forever chemicals). Made in USA. Machine or hand wash cold Line dry Do not iron