Oakley SI Ballistic M Frame 2.0 Strike Array OO9213 Prizm Grey and Clear Lens Sunglasses are ready for the range. These Oakley Standard Issue sunglasses have a single lens that can be replaced with one of the included lenses: Prizm Grey or Clear. No tools are required, and changing the lens is easy. The Prizm Grey lens base makes your surrounding environment appear more vibrant, increases detail visibility, and gives colors a more natural appearance. These lenses are made of Plutonite polycarbonate, which offer high levels of optical clarity. Oakley High Definition Optics technology produces curved lenses that offer accurate views rather than distorted ones. Each lens has an anti-fog coating on the back side. Ultralightweight O-Matter molded thermoplastic frames are built for comfort and flexibility. Wear these sunglasses with helmets even those with helmet-mounted night-vision devices. This pair of Oakley Standard Issue sunglasses meets or exceeds the high-impact and high-velocity standards of ANSI Z87.1 and the ballistic fragmentation standards of MIL PRF-31013, Clause 3.5.1.1.Manufacturer style #: OO9213. Comes with 2 lenses: Prizm Grey and Clear Prizm Grey lens base makes environments appear more vibrant, increases detail visibility, and gives colors a more natural appearance Tool-free, quick lens changes Plutonite polycarbonate lens offer high levels of optical clarity Oakley High Definition Optics curved lens for accurate views not distorted ones Backside anti-fog coatings Unobtainium nose pads stay put even with perspiration Ultralightweight O-Matter molded thermoplastic frame Compatible with helmets and helmet-mounted night-vision devices Meets or exceeds high-impact and high-velocity standards of ANSI Z87.1 Meets or exceeds ballistic fragmentation impact standards of MIL PRF-31013, Clause 3.5.1.1.