Bell ClickRelease shields are compatible with Bell Star, Vortex, RS-1, Qualifier and Revolver helmets only. Bell aftermarket shields feature Bell’s NutraFog II no-fog, no-scratch and UV protective coating. NutraFog II no-fog No-scratch and UV protective coating Bell ClickRelease shields are compatible with Bell Star, Vortex, RS-1, Qualifier and Revolver helmets only. Bell aftermarket shields feature Bell’s NutraFog II anti-fog, anti-scratch and UV protective coating.