Oakley's HDO Optics with Polaric Ellipsoid Technology; A permanent -fog coating on the back surface; UV protection of Plutonite lens material that filters out all of UVA / UVB and harmful blue light up to 400 nm wavelength; Meets or exceeds high mass and high velocity impact requirements per ANSI Z87.1-2003/2010; Meets 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 pad; Full compatibility with helmet-mounted night vision devices; Gray lens features 15% visible light transmittance suitable for bright light, meets MCEPS neutrality and chromaticity requirement; Thin stem technology enable compatibility with over-ear hearing protection and communication systems; Ultra lightweight design (1.05-ounce total weight)