Dye / Proto Switch Goggle Replacement Lens (Northern Lights) DYE/Proto Switch Factory Thermal Replacement Lens Tirodial Lens gives the ultimate in vertical and horizontal peripheral vision. Ensuring you never miss a shot or a move on the playing field. 98% UV protection keeps your eyes from straining during long days, providing you with optimal mental sharpness clarity for optimal decision making and an advantage over your opponents. Dual-pane thermal lenses ensure clear vision no matter the conditions. Keeping you engaged in the game longer and with the optimal level of vision. Patent pending Dyetanium thermal coating protects the lens with real titanium coating. Fits: Dye Axis Pro, Switch EL,FS, and FP