100% Polyester, the extra thickened winter headbands are made of Super-soft fleece and relaxed loose fitness. It is powerful to keep your ears warm in cold and protect your ears from the wind. The ears warmer has good elasticity so that it can fit most of the different head circumferences. Ears headband helps keep your hair out of your face, it can be used as a running, jogging, hiking, or cycling headband.