Oakley® Sylas is a classic frame with reliable features. Feel secure in this new style that goes above and beyond the standard with upgraded features for all-day wear, including a hat compatible design, lightweight frame and Prizm™ Lens Technology. 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.