1. PRACTICAL GLASSES HOLES: On both sides of the skull cap, we have made glasses holes design, which is more convenient to wear riding glasses or other professional glasses, so that the glasses are firmly fixed on our ears, not easy to slip off, and can reduce the burden of the bridge of the nose, so we can focus more on our own exercise . 2. PERFECT GIFT FOR OUTDOOR OR CYCLING ENTHUSIAST: Our thermal skull cap keeps your head and ears warm and protected from the wind in cold weather, whether you're wearing it alone or under a helmet. It's lightweight and easy to carry, making it perfect for cycling, running, skiing, hiking, motorcycling, and outdoor jobs. If you have friends or family who love outdoor activities, this skull cap makes a fantastic gift for Christmas or birthdays, whether they're men or women. 3. ONE SIZE FITS MOST: This winter cycling cap can accommodate different head sizes(head circumferences from 20" to 24").OVER THE EARS: The warm earmuffs are designed to fully cover the ears and provide an excellent barrier from the cold, no more numb frozen ears in the winter. 4. Get yourself ready for winter with our thermal helmet liner with glasses slots! Our winter skull cap, with smooth wind-resistant surface and lined with cozy fleece, which adds to the warmth as well as comfort and retains heat effectively, helps keep the wind chill out and keep your head warm while running or cycling in chilly weathers.