Donating $20 from each sale to the Livestrong Foundation to fund cancer research the Oakley Flak Jacket Livestrong Sunglasses is collaboration with Lance to the commitment of excellence. This special edition glass is designed in the yellow colors of his foundation logo with the word “LIVESTRONG” laser etched at the edge of the lens. Incorporating distortion free High Definition Optics® (HDO®) mounted in Flak Jacket frames the Livestrong sunglass features Oakley's signature XYZ Optics® side contour that gives widescreen clarity. The Plutonite® lens blocks 100% UVA UVB and UVC rays and meets the ANSI Z87.1 standards for high mass and velocity impact resistance. To cut glare and balance light in bright sun the optics are enhanced with BLACK IRIDIUM® lens coating. The permanent HYDROPHOBIC™ lense coating sheds sweat rain skin oils and dust to maintain clarity. The durable and lightweight O MATTER® frame provides incredible performance comfort with a Three-Point Fit that holds the lenses in precise optical alignment with UNOBTAINIUM® components that increase grip when wet. To make the fit adaptable the frame comes with two sizes of interchangeable nosepiece components. Including a protective SOFT VAULT® case with room for an extra interchangeable lens set the Flak Jacket Livestrong Sunglass is also prescription compatible.