Fabric: 85 percent cotton, 15 percent polyester, 1/2 percent elastic. Tops easily stretch over ankles and bounce back into shape. loose fitting tops stretch over ankle for ease of dressing. Tops bounce back for a comfort fit without binding the leg. Allows for better blood circulation, so important for diabetics and people with circulatory problems or neuropathy. Note: for people with such severe edema that shoes are uncomfortable , buyer may find that the next size up might be indicated. (available in other listings in sock size 9-11 and 13-15)sock size 10-13, typically fits shoe sizes men 7 – 11 economical – keep your loved one supplied with diabetic socks at a low price. For best fit, order the sock size that you usually buy at the store. Made in the USA.These quality, durable diabetic socks are approved for individuals with circulatory problems,diabetes, edema, and neuropathy.