The Oakley SI Ballistic M Frame 3.0 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(R), 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.Features :Lenses feature Oakleys HDO Optics with Polaric Ellipsoid TechnologyLenses feature a permanent anti-fog coating on the back surfaceUV protection of PlutoniteA(R) lens material that filters out all of UVA / UVB & harmful blue light up to 400 nm wavelengthMeets or exceeds high mass and high velocity impact requirements per ANSI Z87.1-2003/2010Meets or exceeds ballistic fragmentation impact standards per MIL PRF-31013, Clause 3.5.1.1.