1. ENHANCED WITH FLEECE EAR COVERS: Gear up with our cozy skull caps for ultimate comfort during your cycling and outdoor adventures! Our skull caps feature warm, moisture-wicking, and breathable fleece fabric, along with extended oval fleece ear protection, ensuring maximum coziness and warmth. Say goodbye to cold ears and head during your workouts or cycling sessions, and elevate the overall comfort your outdoor activities. 2. 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 . 3. ADDITIONAL COMFORTABLE WARMTH UNDER THE HELMET: The warm hats is too thick to wear under the helmet? Don't worry! Our helmet liners strike a good balance between lightness and warmth, being thicker at the ears, thinner at the head position, and flat seams that don't add extra stress to the head. Suitable for use under a bicycle, motorcycle or ski helmet and a hard hat. reflective signage for increased when riding at night or working outdoors. 4. RIGHT AMOUNT OF STRETCH: If you are looking for a high performance skull cap that is more snug, won't slip off your head easily, and isn't too tight, then you can choose our hat, which is stretchy and fits any head circumference from 22.4-24.4 inches. The edges are lined with milk silk, which ensures a snug fit on the head and prevents the beanie from sliding or curling. So you don't have to worry about the ear covers curling up like wings and zing your ears in the cold wind.