Select Size to see the return policy for the item. Spandex,Nylon. Machine Wash. MOISTURE-WICKING MATERIAL - Our compression socks are made of 92% Nylon and 8% Spandex, and the moisture-wicking fabric helps draw sweat away from the body. Quality side zippers and open toe design provide effective compression without reducing breathability and comfort. ERGONOMIC WEAR DESIGN - Our compression socks are ergonomically designed for superior comfort and mobility without chafing or irritating. Wearing them will keep your feet and legs fresh all day by providing proper squeezing action to enhance blood flow. GRADUATED COMPRESSION - Our socks use graduated compression of 15-20 mmHg, and put pressure on the right parts to create a "pressure gradient", that helps to improve blood circulation, reduce leg discomfort and swelling, and relieve symptoms of varicose veins. WIDE TARGET AUDIENCE - Doctors and sports trainers highly recommend our compression stocks. If you are a jogger, hiker, football or basketball player, climbing enthusiast, long-term standing worker, etc., then these socks are perfect for you. Give this "health" to your relatives and friends. QUALITY CUSTOMER SERVICE - There are many different styles and colors of socks for you to choose in our store. We not only provide you with high-quality products, but also efficient and high-quality services. Please feel free to contact us if you have any questions. You will not regret buying them.