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.