Provides therapeutically correct graduated support with plenty of comfort and style; Graduated Support Level: Firm (20-30mm / Hg) * Firm support provides relief for severe cases of varicose veins, post surgical wear, moderate swelling and edema * Reinforced toe and heel provide durability. * A silicone-backed lace top stays up for hours without a garter. Other Important Information About FootSmart Women"s Sheer Firm Support Thigh Highs: * Made in USA; 82% nylon, 18% spandex; for first-time wearers, we recommend Light to Moderate Support products to accustom you to the feel of graduated support