With 9 heat emission holes, better wind-dispersing and heat dissipation performance. Streamline designed, can divert wind resistance quickly to minimize wind resistance when cycling, not only effectively enhancing the cycling speed, but also greatly protecting your head. The warning light view range is up to 100m. Thickened PC housing, hard and impact resistant, EPS foamed fabric, light and excellent shock resistance performance, effectively reduce the cycling burden of cyclists.