The CS6 Performance Calf Sleeves offers high performance compression benefits without changing from preferred performance socks. Compression Zone Technology uses precise medical grade graduated compression to enhance circulation and boost oxygen return. CS6 provides stabilizing support for the Achilles tendon and calf muscles, relieving and preventing shin splints and Achilles Tendonitis, while reducing potential micro-tears from impact muscle vibration. Fits easily under socks and sportswear.