Improves circulation to help minimize swelling. Relieves tired, achy legs. Great for travel. Great for being on your feet all day. Designed with graduated compression. Compression decreases gradually up the leg with maximum compression at the ankle to help promote healthy legs. Helps relieve symptoms of mild varicose veins. Helps prevent deep vein thrombosis (DVT). Wide top band for comfort. Reciprocated heel and toe for great fit. 15-20 mm/Hg. Medium fits US shoe size 7-1/2 - 10.