They help maintain blood return. Pack of 2 pairs of Dynaven compression socks of the Sigvaris brand. Self Fixing Dynaven Pure semi-opaque socks, sober and effective that will bring you aesthetics and lightness. It is classified as a medical article. Compression stimulates venous circulation by preventing the vein from dilating and combats the deterioration of the venous wall. It exerts a passive resistance to swelling of the leg that relieves pain and heaviness. They are indicated for people with varicose veins or after surgery or sclerotherapy for a compression of 20 to 27 mmHg. They should be worn regularly except at night. Hand or machine wash on delicate 30º with reduced spin, every day after each use. It comes in pack of 2 in black, semi-opaque density and size XL.