These 6-pair unisex copper-infused knee-high compression socks are perfect for both men and women. Ideal for those with varicose veins, swollen legs, or post-surgery. They help improve circulation and reduce swelling. The socks are made of 94% Polyester, 3% Spandex, and 3% Other Fibers. Men's sizes: S/M for shoe sizes 6 - 9 and calf sizes 9' - 15'; L/XL for shoe sizes 9 - 12 and calf sizes 14' - 19'. Women's sizes: S/M for shoe sizes 5 - 10 and calf sizes 9' - 15'; L/XL for shoe sizes 10 - 12 and calf sizes 14' - 19'.