Dr. Scholl's 1 Pack Surgical Weight Firm Support Socks 80% Nylon, 20% Spandex Made in the USA and Imported Pull On closure Machine Wash These compression socks are expertly designed to apply optimal pressure to your lower legs, which helps maintain blood flow and reduce discomfort and swelling Constructed with maximum compression at the ankle, which lessens gradually up the leg Made with premium microfiber to give you the ultimate softness and comfort Perfect for tired, achy legs, varicose veins, edema, swelling, traveling, post-surgical procedures, DVT/ 20-30 mmHG for firm support Accepted by the American Podiatric Medical Association and every pair of Dr. Scholl's socks is guaranteed for one full year