Alpinestars Sm10 Jett HelmetTop tier off road helmet made for riders who want pro level protection, extreme ventilation and one of the lightest shells available for motocross and enduro competition. Key Features Ultra lightweight aerodynamic shell to reduce neck fatigue Advanced ventilation system with high volume intake and exhaust ports Wide goggle port for better peripheral vision and seal fit Emergency release cheek pads for safer crash removal Breakaway visor design to