SIZING INFORMATION: This frame size is M with a hinge to hinge measurement of 131 mm. Ideal for average faces. FRAME FEATURES: OO9448 Sylas rectangular sunglasses for men deliver all-day comfort with a hat-compatible design. Lightweight matte black ink O-Matter frame with Three-Point Fit and Prizm Golf lenses ideal for distance accuracy in low to medium light. LENS FEATURES: Plutonite lenses provide impact resistance and 100% UV protection (UVA, UVB, UVC, and blue light up to 400mm). PRIZM GOLF lenses improve distance accuracy in low to medium light. Light transmission: 30%. O MATTER FRAME & HIGH DEFINITION OPTICS (HDO): Oakley's lightweight, stress-resistant O-Matter frame ensures all-day comfort and protection. Patented HDO provides superior clarity and razor-sharp vision at every angle perfect for everyday wear and sports. UNOBTAINIUM EARSOCKS, NOSE PADS & THREE-POINT FIT: Unobtainium earsocks and nose pads increase grip with perspiration to help provide a secure and custom fit. Three-Point Fit holds lenses in precise optical alignment. MICROBAG, CLEANING CLOTH & BRAND SHOP: Your new eyewear comes with a specially-woven electrostatic Microclear bag for cleaning and storage. Click on the Oakley link above the product title to shop the entire Oakley sunglass and eyeglass assortment.