Ankle Copper Socks Small/Medium: US Shoe Size Men 6.5-9 | Women 6.5-10 DECREASE FEET SWELLING - This design causes an increase amount of blood to return to the heart and less blood to pool in the feet. This helps in many ways but one of the most noticeable is less swelling in the feet. Why copper socks? Copper socks help the production of collagen, capillaries and other important proteins producing healthier, softer skin. Copper socks also have disinfecting abilities which helps fight the growth of bacteria and fungi during the treatment of ulcers and skin diseases. The antimicrobial properties also help feet be odor free. Copper socks increase circulation, increase oxygen delivery, prevent cramps, and help fight muscle fatigue. These copper socks are designed to do just that.