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. Lenses:Lenses feature Oakley's HDO Optics with Polaric Ellipsoid TechnologyLenses feature a permanent anti-fog coating on the back surfaceUV protection of Plutonite® 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.Secure fit even under wet conditions via Hydrophilic Unobtainium® nose padClear lens features 89% visible light transmittance, suitable for use in low light to no light conditionsPersimmon lens features 69% visible light transmittance, suitable for use in low light to no light conditionsGrey lens features 15% visible light transmittance suitable for bright light, meets MCEPS neutrality and chromaticity requirement Frame:Thin stem technology enable compatibility with over-ear hearing protection and communication systemsSystem features quick, tool-free lens changeUltra lightweight design (1.05-ounce total weight)Full compatibility with helmet-mounted night vision devicesFull compatibility with MICH, ACH, CVD, PASGT, and Crye™ HelmetsImpact and chemical resistant O-Matter® Frame
