15-20 mmHg graduated compression (class 2). Medically approved by quality certificates, includes ISO09001, ISO13485, CE, FDA. Anti-embolism stockings are available as thigh length or knee length stockings. They exert graded pressure at a decreasing gradient from the ankle towards the thigh or knee, which increases blood flow velocity and promotes venous return. Easy on & off, thanks to Polyamide and Elastane materials.