This extra large sock is a soft Health Sock® made with fine merino wool blended with nylon for a long life. It is knitted with a rib to allow extra stretch around the foot and leg and to provide a firm fit so that the sock does not slip or become baggy. Extra large socks are knitted wider than a normal sock to fit larger feet which are usually wider or more bulky. As socks are a knitted fabric, when they are stretched width-ways the sock necessarily becomes shorter. Minimum leg and foot pressure is achieved by using twisted wool/nylon for stretch instead of elastane. This is a hardwearing sock suitable for year-round wear. Click the Size Information button to the left of this text for detail of sizing statistics.