1000 Mile Compression Socks reduce the build up of lactic acid, accelerate blood circulation and prevent muscle oscillation, minimising muscle fatigue/soreness and enabling faster muscle recovery after exercise or injury. The arch and ankle bracing give additional support whilst the padded heel, ball and toe zones, ultra flat toe seam and fitted heel all give your feet extra comfort. Graduated Compression Technology: by a decreasing degree of pressure the sock improves circulation to move old blood out and new oxygenated blood into the region. This reduces muscle fatigue, minimizes swelling and speeds recovery.Tactel rich wicking yarn keeps your feet cool and dryAnkle and arch supportErgonomic toe with left/right labellingCompression level: 14-17 mmhg.60% Nylon, 36% Tactel and 4% SpandexMachine washable