Jobst for Men 20-30mmHg dress socks have a ribbed design, reinforced heel, comfort top band, smooth toe seam. These stockings provide 20-30mmHg of gradient compression to help improve blood flow, prevent edema (swelling), and reduce the discomfort caused by moderate to severe varicose veins. They help in recovery from sclerotherapy and other post-surgical procedures, and help prevent the recurrence of venous ulcerations. Woven from 73% nylon and 27% spandex in the USA.