NB: The helmet fits large, we recommend trying a size down. THE DOWNHILL PROTAGONIST: Building on the huge success of the Full-9, incorporating feedback from trusted athletes, and thanks to new technologies we've developed in-house, the Full-10 Spherical has been designed to be the new standard in downhill fit, protection, and style. Created in the Bell+Giro labs in Scotts Valley, California, our exclusive Spherical Technology™ based on Mips® features a Sphere-Bearing design that helps redirect impact forces away from the brain, allowing the outer shell to rotate around the inner shell during a crash. Furthermore, the airflow channeling built into the Spherical Technology within the lightweight carbon shell provides superior ventilation like never before, what we call our Thermal Exchange Airflow System™ (T.E.A.S.). This system draws in cool air like a vacuum and then expels warm air through the side and rear exhaust ports, because as every rider knows, ventilation and sweat management go hand in hand. With the Full-10, the quality is evident: from the super-comfortable antibacterial Ionic+™ padding*, to the removable magnetic cheek pads, down to the integrated hidden camera mount and the reinforced titanium buckle. These details are all for you, rider, because when you're on the start line, or on the lip of the jump that will launch you into glory, we want you focused only on the run ahead. *The antibacterial Ionic+ padding uses silver fibers for odor control.