Product Overview: Introducing Oakley® 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 - FIT: Three-point fit is designed for comfort and to hold your eyewear in precise optical alignment - LIGHTWEIGHT: Lightweight O Matter™ frame material provides durability and all-day comfort - PRESCRIPTION: Available with Oakley Authentic Prescription Lenses for athletes of all levels with RX needs Product Code: OO9448-0157 (Black Frame), OO9448-0257 (Brown Frame)