Mountain Biking Helmet CAIRBULL Full Face Bike Helmet with Detachable Chin Guard and Visor

Camera port and goggles port allow you to mount your camera and goggles on helmet.. Adjustable dial system fits head circumference: 54-61cm (21.2"-24"). 18 air vents take away excess heat to keep you cool and comfortable. In-mold construction with hard polycarbonate shell and EPS lining for impact resistance and protection. Detachable chain guard and visor makes helmet switch easily between a half face and full face helmet