Varcoh ® Medical Grade Compression stocking provides of gradient compression and should be worn under a doctor’s supervision. This helps relieve severe varicosities, severe edema (swelling), and chronic venous insufficiency. It helps during healing after surgical and sclerotherapy procedures and helps prevent venous ulcerations. This level also helps relieve superficial thrombophlebitis. Compression Level: 8-15 mmhg, 15-20 mmhg, 20-30 mmhg, 30-40 mmhg.