Jobst Opaque thigh highs are made from smooth, soft, breathable fabric and are available in regular or petite lengths (leg length 27" or less) with an open or closed toe. They feature a comfortable silicone dot top band that keeps them firmly in place. This stocking provides 20-30mmHg of gradient compression and helps improve blood flow, prevent edema (swelling), and reduce the discomfort caused by moderate to severe varicose veins. It helps in recovery from sclerotherapy and other post-surgical procedures. And it helps prevent the recurrence of venous ulcerations. Woven from a 72% nylon, 17% spandex, and 11% silicone in the USA.