Bell Transitions SolFX Photochomatic Faceshield for Bell Star, Bell Vortex, Bell Revolver, and Bell RS-1 Helmets Transitions Photochromatic shields automatically adjusts to light conditions, darkening when exposed to sunlight and clearing in low light. It eliminates the need change between tinted and clear shields when riding in the light of day, the darkness of night and anything in between. Features Shield tint automatically adjusts to lighting conditions Bell NutraFog II anti-fog coating reduces fogging Anti-scratch and UV-protected coatings block 99 percent of UV rays Compatible only with Bell ClickRelease shield system (featured on Star, RS-1 and Vortex full-face helmets)