Bamboo. Graduated compression. Promotes circulation. Reduces swelling and fatigue. Great for standing, sitting and travel. Bamboo: Anti-microbial odor reduction. Naturally moisture wicking. Quick drying. Look good, feel good. American Podiatric Medical Association accepted. www.plusMD.us. Promotes Leg Circulation: +MD graduated compression systematically applies graduated pressure to the lower legs increasing blood flow back towards the heart. Helps Reduce Swelling: +MD Travel Socks massage the legs and feet, helping to reduce edema (swelling). Reduces Leg Fatigue: +MD Travel Socks use engineered pressure zones for optimal support, reducing fatigue while standing, sitting, and traveling. Relief for Varicose and Spider Veins: +MD Compression Socks may aid in the prevention and relief of varicose and spider veins. Anti-Microbial and Moisture Wicking: +MD Travel Socks utilize bamboo to help keep your feet fresh, dry and comfortable. Bamboo's moisture-wicking and anti-microbial properties help to naturally reduce odors and discomfort. Sock Size: Medium: Women Shoe: 6-10, Men Shoe: 5-10. Satisfaction Guarantee: Your satisfaction is important to us. If you are not satisfied with this product, launder and return it to Customer Service PO Box 6127 North Logan, UT 84341 and we will gladly replace it. Phone: 1.888.430.9888. www.plusMD.us. Designed in USA. Made in China. Made in Taiwan.