Bell Revolver EVO Helmet - Medium/Black Industries first flip-up helmet designed to have the function and performance for even the most serious sportbike riders Internal Sun Shade offers "on the fly" protection from the sun without having to stop and change shields Velocity Flow ventilation system with FlowAdjust provides class leading ventilation and temperature control Lightweight composite polycarbonate alloy shell Stable aerodynamic signature resists buffeting and lift at speed