Compression stockings provide controlled compression to the legs to squeeze away abnormal back flow of blood into the superficial veins that lie just beneath the surface of the skin from the perforating veins. It is used in all forms of venous disease including blood pools or congests in legs. Severe varicose veins and discolouration?to sores, ulcers and potentially life-threatening blood clots. Made from soft nylon yarn and spandex : Strong and durable, dermophillic, optimal compression, excellent aesthetics and excellent color fastness