Oakley Mens SI Ballistic M Frame 2.0 Matte Black Frames - Clear Lens - Non-Polarized SunglassesStyle: 0OO9213 921307 The Oakley SI Ballistic M Frame 2. 0 surpasses ANSI Z87. 1 Industrial Standards for high mass and high velocity impact protection. The M Frame 2. 0 additionally meets MIL SPEC MIL PRF 31013. All lenses are made of pure Plutonite, a proprietary material that offers the highest level of optical clarity available in eyewear. It also features a clip that holds the lens and frame together providing more secure support. Product