It is important that people undergoing treatment or post venous surgery, with venous return problems or with "economy class" syndrome wear compression socks.Farmalastic has manufactured the antibacterial sock (A-D). This Farmalastic antibacterial normal compression sock provides the leg with a gentle upward massage by exerting more pressure on the ankle and less on the upper part, thus facilitating venous circulation. This product has the foot knitted in silver thread to prevent odor and bacteria.These orthopedic socks are suitable for mild cases of varicose veins or minor circulation problems. Suitable for people who work long hours on their feet. help your venous circulation!*This product only includes a single sock. The T-extra large has an approximate calf circumference of 40-42 cm and ankle circumference of 26-27 cm. *For hygiene reasons, no returns or exchanges will be accepted on this product.