SIZING INFORMATION: This frame size is Medium with a hinge to hinge measurement of 129. Ideal for average faces. FRAME FEATURES: OO4129 Split Time feature an aviator, navy frame and Prizm sapphire Iridium polarized lenses Oakley Plutonite lenses offer impact resistance and 100% UV protection (UVA, UVB, UVC, blue light up to 400mm). PRIZM Sapphire Polarized lenses enhance color in medium to bright light. HD Polarized lenses block 99% of glare. Light transmission: 12% O MATTER STRESS-RESISTANT FRAME: Oakley's lightweight, durable frame ensures all-day comfort and protection. Injection-molded thermoplastic O-Matter offers better strength and flexibility than acetate, resisting shifting or deforming over time UNOBTANIUM EARSOCKS & NOSE PADS: Unobtanium earsocks and nose pads for increased comfort and performance. Pads increase grip with perspiration to help provide a secure and custom fit MICROBAG & CLEANING CLOTH INCLUDED: Includes a microbag and cleaning cloth for lens care and storage—click on the Oakley link above the product title to explore the full Oakley eyewear assortment