Product Info Fit - Standard 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. ? 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 DIMENSIONS LENSES 1Lens Width 57 mm 2Lens Height 42.4 mm FRAME 3Frame Width 132.6 mm 4Bridge Height 17 mm 5Arm Length 142 mm