Polycarbonate composite shell New lower mouth and top vents provide better air intake Increased ventilation with enhanced defogging New, wind tunnel tested rear spoiler greatly reduces air drag Includes Pinlock(R) prepared HJ-34P shield Improved vision with up to 10mm increased side view Four shell sizes, including youth size Interchangeable cheek pads Removable, washable interior Universal clamp space makes for easy installation of any Bluetooth(R) device Standards: DOT Approved