Check out these Oakley SI Tombstone Spoil Sunglasses These Awesome Sunglasses Feature: a Lenses feature Oakley&';s HDO Optics with Polaric Ellipsoid Technologya Lenses feature a permanent anti-fog coating on the back surfacea UV protection of PlutoniteA(R) lens material that filters out all of UVA / UVB & harmful blue light up to 400 nm wavelengtha Meets or exceeds high mass and high velocity impact requirements per ANSI Z87.1-2003/2010a Meets or exceeds ballistic fragmentation impact standards per MIL PRF-31013, Clause 3.5.1.1.a Secure fit even under wet conditions via Hydrophilic UnobtainiumA(R) nose pada Clear lens features 89% visible light transmittance, suitable for use in low light to no light conditionsa Persimmon lens features 69% visible light transmittance, suitable for use in low light to no light conditionsa Grey lens features 15% visible light transmittance suitable for bright light, meets MCEPS neutrality and chromaticity requirementa FRAME:a Thin stem technology enable compatibility with over-ear hearing protection and communication systemsa System features quick, tool-free lens changea Ultra lightweight design (1.05-ounce total weight)a Full compatibility with helmet-mounted night vision devicesa Full compatibility with MICH, ACH, CVD, PASGT, and Crye(TM) Helmetsa Impact and chemical resistant O-MatterA(R) frame The Oakley SI Ballistic M Frame 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 PlutoniteA(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.