Oakley Crossrange OO9631 Polarized Sunglasses bridge the gap between casual and performance eyewear with interchangeable temple stems and nose pads that let you adjust style and function to meet your demands. These polarized Oakley sports sunglasses have Prizm lenses to control light transmission resulting in colors that maximize contrast, reduce glare and enhance visibility. Unobtainium nose pads maintain their grip through sweat and moisture and the Three-Point Fit holds lenses in precise optical alignment while eliminating pressure points. High Definition Optics meet or exceed American National Standards Institute testing for optical clarity, visual fidelity and impact resistance. Select styles are Standard Issue series to make them combat-ready. Oakley Crossrange Polarized Sunglasses have a classic, slightly retro style and a standard fit. Made in USA. About Oakley lenses: Prizm: Designed to deliver ultra-precise color tuning for any environment. By fine-tuning individual wavelengths of color to make everything vivid and vibrant Prizm sharpens visual acuity to reveal nuances that would otherwise be missed by the naked eye. Iridium: This special metal oxide coating allows Oakley to fine-tune lenses of any color. The iridium coating regulates contrast, glare, reflection, light transmission and light absorption, tailoring the lenses to better fit specific conditions. Gradient: Offers a smooth transition in shading from a darker top to a lighter bottom while still retaining true color perception. Photochromic: A premium option for select single-lens eyewear designs it darkens the lens automatically to help you adapt to changing light and always perform at your best. Even when the photochromic lens color lightens it still filters out 100% of all UV. Standard Issue(SI):Oakley Standard Type: Polarized.