Part of the Standard Issue series for combat-ready performance, Oakley SI Sylas OO9448 Prizm Grey Polarized Sunglasses go above and beyond the standard with upgraded features for all-day wear, including a hat-compatible design and Prizm Lens Technology. HDPolarized to reduce glare, the Plutonite polycarbonate lenses filter 100% of all UVA/UVB/UVC and harmful blue light. The lenses feature Prizm technology that helps fine-tune your vision for specific sports and environments by maximizing contrast and enhancing visibility; the Prizm Grey lenses have a light transmission value of 17% and give a warmer appearance to colors, increasing contrast during everyday use. These Oakley Prizm sunglasses have O Matter frames that are lightweight and stress-resistant, with a distinctive keyhole nose bridge and a hat-compatible, wraparound style. Like all Oakley sunglasses, the Sylas boasts a Three-Point Fit and includes a microfiber cleaning bag and a 2-year limited coverage warranty.Manufacturer style #: OO9448-0857. Part of the Standard Issue series for combat-ready performance HDPolarized lenses reduce glare Plutonite polycarbonate lenses filter 100% of all UVA/UVB/UVC and harmful blue light Prizm lenses for ultra-precise color tuning in any environment Lightweight O Matter frames with keyhole nose bridge Three-Point Fit holds lenses in precise alignment and provides a comfortable fit Includes microfiber cleaning bag and 2-year limited coverage warranty