Vitalsox technical performance material designed using quick drying Polypropylene Maximum circulation- The feet are the furthest point from your heart by increasing fresh oxygenated blood to your damaged tissues by up to 40% faster recovery time performance is enhanced Ideal range- is the most beneficial for running, Cross fit, walkers, pregnancy, maternity, vein support, marathons, sports, gym, yoga, Spartan, standing, working, sitting, or even while you sleep