1. Excellent thermal performance: Our winter ear warmers are made of inner wool thermal insulation material and outer windproof material, which can not only protect your ears from the wind, but also keep them warm in cold weather.2. Cover your ears: Unlike traditional earmuffs, our wool ear warmer headband is widened at your ears, completely covering your ears, which increases the comfort of putting earplugs in your ears during exercise. In addition, they are also suitable for being placed under your bicycle helmet.3. Stay where you are: When doing strenuous exercise, earmuffs are easy to slide down. Will you still have this problem? Our earmuffs are round, and it can stay in place no matter what kind of activities you are doing. Make sure it fits your ears.4. One size fits everyone: This ear warmer headband is very soft and elastic, and one size can fit most people. We also specially designed ponytail holes on hair bands for women, so don't worry about messing up your beautiful hair.5. Multi-function: Breathable sweat absorbent belt in winter helps to prevent sweat from the head and forehead from sliding into eyes, so it is very suitable for outdoor activities such as cycling, running, hiking, skiing, snowboarding, yoga, fitness, etc.