Smith Optics Outside The Wire Goggle with Clear Installed Lens and Gray Spare Lens Outside The Wire Goggles meet US Military Spec MIL-DTL-43511D,ANSI Z87.1-2003 Superior Field Of Vision. Tapered Lens Technology for distorion free optics-The goggle is compatible with the Smith Elite Interchangeable Rx system Anatomically optimized design for seamless helmet intergration and face fit Lenses provide 100% protection from harmful UVA/UVB/UVC rays-Anti-fog and scratch resistant on all lenses FRAG face foam-flame resistant anti-microbial goggle foam