Sierra Socks 2 Microfiber Firm Compression Calf Sleeve Brace 18-24 mmHg Made in USA 85% Nylon, 15% Spandex Made in USA Machine wash, warm with like colors. Non chlorine bleach. Tumble dry low. 2 firm surgical weight microfiber calf sleeve. Worn by men & women. Graduated compression relieves tired legs. Non binding welt, top & bottom. Relief for strained calf muscles. Two way stretch design provides extra comfort. Provides warmth to aid in blood circulation. Helps the process of healing of calf muscle. MEASURE CALF CIRCUMFERENCE FOR SIZING. PROUDLY MADE IN THE USA.