Shoei Qwest Overt Tc3 Lrg Aerodynamic properties are maximized through extensive wind tunnel and professional riders feedback, Dual Layer EPS liner enhances impact absorption and ventilation Five shell and six EPS liner sizes present increased fit options that help to comfortably fit most head sizes, Molded air spoiler to reduce drag and lift as well as diminish weight pressure on the neck while riding at high speeds Upper Air Intake Vent is positioned to maximize air volume into the helmet interior, Large upper intake vent positioned to maximize performance in high wind conditions, Easy to operate large lower intake vent Lower air intake/defroster vent reduces shield fogging and increases ventilation, The rear/neck outlets allow for effective air exhaust, Breath guard and chin curtain included, Snell-M2010, DOT Lightweight Advanced Integrated Matrix Plus (AIM+), High performance fiber materials are combined with extremely elastic organic fibers to create a shell structure that is ultra lightweight, rigid and resilient