20-30 mmHg graduated compression (class 2). Medically approved by quality certificates, includes ISO09001, ISO13485, CE, FDA. . Suggest to be applied for: more serious symptoms | more marked varicose veins or moderate edema | after healing of minor ulcers | after sclerosis and surgery for varicose veins | after deep vein thrombosis (DVT) | insufficiency (weakness) of the valves in the deep veins. Easy on & off, thanks to flexible materials.