The last thing you want to think about during a long Mountain Bike ride is your helmet. That's the Sixer: well-ventilated, excellent protection, and it fits so well you forget you're wearing it. The Sixer hits the trail with integrated MIPS Technology, which allows for a perfect fit thanks to the Float Fit system ensuring unprecedented comfort. Full compatibility with goggles and a snap closure at the back of the helmet, adjustable visor height, and provisions for a camera/lights complete the package. Every detail of the Sixer has been developed so you won't have to worry about a thing! CERTIFICATIONS: CPSC Bicycle, CE EN1078. VENTILATION HOLES: 26 holes, 4 frontal holes. VENTILATION: Dual Flow T STRUCTURE: Fusion In-Mold Polycarbonate Shell - Progressive Layering. FIT SYSTEM - Float Fit RaceT (Integrated with MIPS)