The Super Air is the first trail helmet to offer Spherical Technology, making it Bell´s most advanced trail helmet. Period. Spherical Technology's Ball-and-Socket design, powered by MIPS, helps redirect impact forces away from the brain by allowing the outer liner to rotate around the inner liner during a crash. This combination of outstanding safety, optimized ventilation, and extreme lightness brings epic achievements within reach—on any trail, in any terrain. When you're ready to step up, upgrade by adding the optional chin bar. See you on the trail!  MIPS SphericalMIPS Spherical is a refinement and evolution of the Multi-Directional Impact Protection System (MIPS). With this sophisticated design, two layers of EPP foam fit together like a ball-and-socket. This system helps protect the brain from rotational energy by allowing up to 10- to 15- millimetes of relative motion between the helmet and head during the first milliseconds of an impact. Overbrow VentilationOverbrow ventilation features intake ports on the brow of the helmet to usher in cool air and push it through the air-channel matrix for full-head ventilation. Float FitBell's most advanced helmet fit system combines comfort and safety in an ultra-lightweight design. Float Fit optimizes the fit of the helmet in 2 ways - in terms of head circumference and vertical adjustability. To reduce weight and simplify usability, the guide arms uniquely enclose the back of the head thanks to "Float" design. This puts the helmet in an ideal position on the head. Simple, lightweight and comfortable.