Attitude without compromiseLithium was built from the ground up with aggressive styling and enhanced aerodynamics for performance-minded motorcyclists. Lithium's removable interior liner delivers all-day comfort, the Clickrelease V2 shield with ratcheting detents, and four closable vents on the helmet's exterior allow riders to customize airflow easily. With comms compatibility, an easy-to-use micrometric buckle and DOT and ECE 22.06 certifications, Lithium was built to surpass expectations. Specs Impact Management    Mips® Shield Type    Class 1 optics drop-down sun shield with ClickRelease V2 shield Extras    Pinlock 70 shield included Construction    Polycarbonate shell Ventilation    4 Closable vents Electronics Compatibility    Communication systems ready Certification    DOT (US)ECE (EU) Technology Mips® Mips (Multi-directional Impact Protection System) is a leading slip-plane technology inside the helmet designed to help reduce rotational forces that can result from certain impacts. Class 2 Optics Drop-down Sun ShieldClass 2 optics drop-down sun shield with ClickRelease V2 Shield. Construction    Polycarbonate shell. Ventilation    4 Closable vents AEGIS Performance LinerRemovable/washable performance material for ventilation & comfort. 3 Shell SizesTypical offering requires additional padding sizes to accommodate all head sizes.