Ebony/Black- Mediven Sheer and Soft. Size II. 15-20 mmHg. 42652. 15-20 mmHg is for mild medical compression for minor spider veins, slight varicose veins, and tired, achy legs. Graduated compression means pressure is strongest at the ankle and decreases as it goes up the leg. Compression therapy can help slow the progression of vein disease and promote a stronger circulatory system by supporting incompetent venous valves and accelerating blood flow back to the heart. 4 pair available.