The 120 Sheer Fashion knee high is designed to look and fit like fashion hosiery, yet therapeutically designed to provide 15-20 mmHg of graduated compression to promote leg health. This level of compression is great for preventing mild swelling, energizing tired legs, and preventing spider and varicose veins. This style features a soft blend of fibers. They've also made the heel and toe sheer, so women can wear open toe and slingback shoes without the reinforced fabric appearing.