Excellent impact protection: this bicycle helmet has EPS foam inside and a hard PP shell outside. Double defence lines protect your safety. the foam inner layer inside the cap body helmet is used to absorb the impact force in the event of an accident and reduce the accident injury. Comfortable riding experience:which can relieve head and neck pressure and reduce the strain when cycling. At the same time, the bicycle helmet has 20 ventilation holes, which not only have low wind resistance, but also strong air permeability. Safety rear light and illuminated front light: the rear light is designed for the safety of the and has 3 flashing modes (normal on/fast flashing / breathing). The visible distance of the rear light at night can reach 200 metres. The headlight can be used for lighting. The headlight has 3 white LED lights and the maximum beam distance is 15 metres. More details: the advanced version of the removable insect screen can effectively prevent foreign bodies such as insects from entering the helmet while driving. There is a button on the back of the riding helmet. Riders can adjust the size of the helmet according to their head size. For a comfortable ride on the bicycle: the head circumference can be adjusted as desired and adapts to the European and American version and ergonomics precisely and firmly to a high level of comfort. helmet suitable for scooters and cyclists Colour: Cyan Blue Material: PP+EPS Size: M: head circumference 54-57cm Package Contents: 1 x helmet 1 x usb line Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.