Practical Glasses Holes: ROCKBROS helmet liner features handy glasses holes on both sides, allowing you more convenient to wear cycling glasses without any disruption.The glasses are firmly fixed on glasses holes, hard to slip off and reduce the burden of the nose. You can focus more on your exercise.

Comfort: Our helmet liner is made with warm fleece inside, providing excellent wind protection on cold days. Our skull caps under helmet features warm, moisture-wicking, and fleece fabric, along with enhanced fleece ear covers. Stay comfortable and warm in the cold.

Warm: The winter skull cap has a smooth, wind-resistant surface and a cozy fleece lining that adds warmth and comfort. It effectively keeps your head warm while cycling in chilly weather. It provides coverage for your head, face, and ears, offering enhanced warmth.

One Size: ROCKBROS cycling cap features a stretchy design. Fits head circumferences from 52 to 61 cm (21 - 24 inches) tightly. Our motorcycle helmet liner are warm yet lightweight, and they fold down extremely small, easily fitting into your pocket. Take this compact fleece helmet liner with you.

Suitable for helmet types: ROCKBROS skull cap under helmet fits perfectly under bicycle, ski, snowmobile and motorcycle helmets. It sits firmly during aggressive activities. The cycling hat under helmet for motorcycles and bicycles to protect the face in winter. Ideal for various outdoor activities, such as cycling, motorcycle, work.