High Definition Optics® is a collection of patented technologies that allow Oakley eyewear to meet or exceed the testing standards of the American National Standards Institute for optical clarity, visual fidelity, and impact resistance. Standard HDO® lens. Comfort and performance of Three-Point Fit that holds lenses in precise optical alignment. Patented hydrophilic Unobtanium® ear pads ensure a snug, secure fit. Optical precision and impact resistance meet or exceed Z80.3 optical and basic impact standards. Metal icon accents. Made in the U.S.A. This product may have a manufacturer's warranty. Please visit the manufacturer's website or contact us at for full manufacturer warranty details.