The 31 air vents ensure optimal ventilation, the aero shell provides excellent aerodynamics, and the helmet "The One" offers space for your sunglasses if you wish to take them off during the race. All these features come without any compromises on safety, thanks to the QR code and LED light specifically developed by BOLLÉ. The One has a special winter lining to guarantee year-round use of the helmet. A removable visor is included to make the helmet suitable for mountain biking as well. Removable aero shells: With the removable aero shells, you can control the ventilation and aerodynamics of your helmet. The model "The One" features 31 air vents that can be partially or fully covered, leaving the choice up to you. Safety QR Code: In the event of an accident, anyone can read the QR codes using a smartphone.