The ear warmer was made of high quality fleece and polyester, which is very powerful to make ears warm, no more worry about being cold in ears, never suffer numb frozen winter ears. super soft and comfortable in ears by wearing it when being indoor or outdoor. Our winter ear warmer headband great for indoor & outdoor activities in this winter season. To a large extent for keeping it in place no matter what kind of activities you are doing. Headband ear warmer is supper elastic, fitting most of the different head circumferences of ages. Our running ear warmer use single-layer polar fleece, which is moderate in thickness. You can wear a helmet without feeling heavy. In winter, you can prevent cold wind from entering your ears and keep your ears warm.