Features: Breathable and Perspiration: The cycling cap is breathable and perspiration with high elastic comfort. UV Blocking: Against U-V rays and blocks U-V rays in summer. High Elastic: The cap is well fit without tightness, using four-sided elastic fabric that is comfortable to wear without tightness. The tops vent design for fine breathability and no sweat. It can be used as a helmets lining to matchs the helmets. Holes are cut on both sides to wear glasses.