Copper: Features copper fiber which helps stimulate blood circulation within your legs. Sizes: Get these socks in three sizes: S/M, L/XL, or XXL. Material: Made from 100% nylon. Therapy: By improving your blood circulation, these socks aid restoration, swelling, and help relieve varicose veins. Ergonomic: With its compact compressed weave, these socks are ergonomic and provide great cushioning between your toes. Compression socks: Redeem a three pack of knee high copper compression socks in black, nude, and white! | 3 Pack Copper Knee High Compression Socks | Wowcher