Recommended for people with reticular varicose veins. Used to prevent deep vein thrombosis. Essential for large loads on foot. Reduce the risk of thrombosis. Remove excess pressure on the parties of veins and normalize blood circulation. Relieve swelling and fatigue. Reduce the risk of thrombosis. These socks are perfect for runners, athletes, fitness workouts, gym, hiking, tennis, cycling, office workers, airplane travelers, skiing, cross fit or anyone (e.g. doctors and nurses) who are on their feet all day! (ATTENTION: Please refer to size chart in the images of listing before ordering). Better oxygen circulation helps reduce lactic acid build up and aids muscle recovery. The materials are breathable and wicks moisture away. The anti-fungal material stops the growth of bacteria, deodorizes and keeps you dry even with longer use. GRADUATED COMPRESSION (16-18 mmHg) BOOSTS BLOOD CIRCULATION - Better Blood Circulation as strongest compression happens at the ankle, and gradually decreases moving up the leg.