navy Marathon pro compression socks 20-30 mhHg size S/M The Marathon socks, offers true graduated compression, which 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. Fabric & Care 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