A comfortable assist for those with diminished circulation, varicose veins, and ankle swelling. 15-20mmHg at the ankle which gradually relaxes up the calf. Formed heel for long lasting duarability & great fit. Outward seaming prevents skin irritation. Moisture management system allows skin to breathe. Latex free and opaque. Knitted in the USA. Made of 77% Nylon/ 22% Spandex/ 1% Other.