Introducing OakleyÃî Sylas, 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. Features: HAT COMPATIBLE: Hat compatible frame and temple design with an increased extended periphery; SEE MORE DETAILS: Available with Prizm lenses that are designed to enhance color, contrast and detail to make the most of any activity.