Trail BossThe Super Air is the first trail helmet to offer Spherical Technology, making it our 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 reachon any trail, in any terrain. When you're ready to step up, upgrade by adding the optional chin bar. See you on the trail! Availability, certification, color, and pricing may vary per region. If outside of the USA, please check with your authorized local dealer for more information.Key Features:Impact Management: Spherical Technology, powered by Mips®Circumference: 52-56 cmConstruction: Fusion In-Mold polycarbonate shellProgressive Layering: Visor: Adjustable visorVentilation: Overbrow VentilationFit System: Float FitProduct Weight: 410g (Size