The secret is the fusion of two technologies, graduated compression and copper-infused fibers, to help improve circulation and reduce swelling, also helping to relieve aches and pains. Copper Compression Socks are anti-microbial to naturally eliminate odors with breathable, wickable fabric to get rid of embarrassing smelly feet! Nylon/copper/spandex. Machine washable. 

Size Chart : 

Women's: Small (<6), S/M (6-8.5), L/XL (9-11), XXL (11-13); 

Men's:  Small (<6), S/M (5-8.5), L/XL (9-10.5), XXL (11-12.5)