Oakley(R) 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(TM) Lens Technology. Sylas is a larger lifestyle option for those who like a flat frame with style. Slightly larger than their top seller, Holbrook XL, Sylas is a great fit. Fit & Design: Hat compatible frame and temple design with an increased extended periphery Three-point Fit is designed for comfort and to hold your eyewear in precise optical alignment Lightweight O Matter(TM) frame material provides durability and all-day comfort