1.Comfortable cotton and wool: Outfitted with plush fleece lining, our ear warmers blend comfortable cotton and wool to shield against brisk winds, while the autooff feature prevents overheating, extending battery life 2.Fast Heating Experience: Equipped with a builtin PI heating pad, our ear warmers swiftly reach your desired warmth in just 3 seconds, featuring 3 adjustable temperatures (Low: 45degrees, Medium: 50degrees, High: 55degrees) for tailored comfort 3.Average size: Get good warmth in chilly weather with our heated ear warmers. With good elasticity and an average size design, our ear warmers are good for most head circumferences 4.For men and women: Achieve good coziness with our heated ear warmers, engineered to keep your ears comfortably warm during daily winter wear. Suitable for men and women, these fashionable accessories are good for various outdoor activities like hiking, skiing, and running