Attitude Without Compromise. The Lithium was built from the ground up With aggressive styling and enhanced aerodynamics for performance-minded motorcyclists. Progressing helmet design and technology has been part of Bell's mission since the day Roy Richter founded the company and Lithium is the next step in Bell's pursuit of helmet innovation. Offering premium performance in a polycarbonate shell that delivers safety, comfort and bold styling, makes Lithium one of the most exciting releases from Bell in 2024. These rider first features make Lithium and must have for motorcyclists that refuse to compromise. Construction: Polycarbonate shell. Three shell sizes. Multi-density EPS liner. Ventilation: Four (4) closeable vents. Other Tech and Features: Class 2 Optics drop-down sun shield with Clickrelease V2 shield.