Compression socks improve blood flow and reduce swelling to reduce the risk of DVT (Deep Vein Thrombosis) and DOMS (Delayed Onset Muscle Soreness). People of all ages can be exposed to these maladies, especially if they travel on airplanes long distances. The socks are designed with a graduated compression from 15mm Hg at the ankle to 20mm Hg over the calf. They are constructed with Wick Dry material, so they keep your feet drier, and are formed to provide a superior fit. The medium weight “On the Go” socks are 57% recycled polyester, 38% nylon and 5% spandex. Please specify size from drop down above.