Core-Spun Mild (15-20mmHg) Graduated Compression Support Knee High Socks Nylon Moderate graduated compression delivers a controlled amount of pressure that is greatest at ankle and gradually decreases upward to promote better blood flow Coolmax and X-Static silver fibers, wrapped around a core of spandex, give socks plenty of stretch and allows for easy on / off Micro-Cool design creates a superior wicking effect, so moisture evaporates from skin quickly, keeping feet comfortably cool Helps relieve Circulation, DVT, Economy Class Syndrome, Edema, Foot Odor, Foot Perspiration, Heaviness in Legs, Hyperhidrosis, Leg Pain, Leg Veins, Spider Veins, Swollen Ankles, Swollen Feet and Legs, Tired, Aching Feet, Varicose Veins, Venous Insufficiency Non-binding comfort top keeps socks in place all day ; Balloon toe and heel help eliminate irritation; Made in USA