Oakley engineering takes performance to the next level and brings style along for the ride. Flak 2.0 offers a standard size frame with enhanced lens coverage, and every millimeter of the lens is optimized with High Definition Optics in a ruggedly durable yet lightweight design. Designed to push your limits with patented XYZ Optics for razor sharp clarity and secure grip of Unobtanium. Prizm Polarized features the maximized contrast and enhanced visibility of Prizm with the glare filtering benefits of Oakley HD Polarized. - Light Transmission: 11% - Light Conditions: Bright Light - Contrast: Increased - Base Lens Color: Grey