Oakley have taken all your favorite features of Oakley\'s best-selling style Holbrook, and crafted it into a lightweight sheet metal frame with advanced technology, taking this time-honored style one step further.HIGH DEFINITION OPTICS®High Definition Optics® (HDO®) 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.POLARIZED®Improving safety, comfort and performance, Oakley HDPolarized lenses filter out 99% of reflected glare without the haze and optical distortion that can come with polarized lenses made with conventional manufacturing techniques.PRIZM™Prizm™ is a revolution in lens optics built on decades of color science research. Prizm™ lenses provide unprecedented control of light transmission resulting in colors precisely tuned to maximize contrast and enhance visibility.