RelaxSan closed-toe medical compression hold up stockings provide moderate graduated compression (15-21 mmHg - Class 1), which encourages the return of blood to the hearth. They are recommended to reduce symptoms of swelling and heaviness of the leg, treat mild varicose veins and venous disorders, and prevent embolism and thrombosis. These graduated compression hold ups are very comfortable, long-lasting and opaque thanks to the soft microfiber contained in their fabric. Their hypoallergenic silicone top bands prevent the stockings from rolling up, while the reinforced heels and toes and invisible flat seams guarantee maximum comfort and durability.