The Sigvaris Women's Casual Cotton Sock delivers a compression level of 15-20 mmHg and is Calf Length. It is made with premium Supima Cotton for optimum softness, comfort and durability. It features a flat, low friction toe seam to prevent irritation and a soft, stretchable knit-in band prevents pinching. This sock will help to alleviate tired, heavy, restless, aching legs. It is best suited as a preventative option for people who are at risk for swelling or other venous insufficiency symptoms during travel, occupational risk, pregnancy or family history. FeaturesThe Sigvaris Women's Casual Cotton Sock delivers a compression level of 15-20 mmHg and is Calf Length. It is made with premium Supima Cotton for optimum softness, comfort and durability. It features a flat, low friction toe seam to prevent irritation and a soft, stretchable knit-in band prevents pinching. This sock will help to alleviate tired, heavy, restless, aching legs. It is best suited as a preventative option for people who are at risk for swelling or other venous insufficiency symptoms during travel, occupational risk, pregnancy or family history.