1. Rear Wear and Foldable Design: Our heated ear warmers are designed to be worn behind the head for a comfortable fit without interfering with hairstyles, hats, or helmets. Additionally, they are foldable for easy storage and portability. 2. Warm Fleece Lining: Our heated ear muffs has Soft, cozy Polar fleece lining provides additional warmth and comfort, effectively shielding your ears from icy winds and low temperatures.Equipped with an automatic shut-off function(over 55° C ) for and power conservation, preventing overheating and extending battery life. 3. Widely Used: Suitable for both men and women, these heated earmuffs are a fashionable accessory for various outdoor activities such as hiking, skiing, running, or simply for everyday winter wear.It's the perfect gift for family, elders, colleagues and classmates during the days of Christmas, Halloween, Thanksgiving, Easter, birthdays, parties and anniversaries. 4. Fast Heating and Adjustable Heating Levels: heated earmuffs are Built-in PI heating pad, three seconds quick heat, Choose from 3 heating levels(Low: 45° C - Medium: 50 ° C - High: 55° C) to suit your comfort preferences on cold days, ensuring your ears stay comfortably warm without overheating.