OAKLEY Fall Line Cylindrical rimless style with a complete lens seal in a compact mid-sized fit. FEATURES Optically correct cylindrical rimless lens design with F3 Anti-fog coating Discreet frame notches at temple for compatibility with most RX eyewear frames Ridgelock lens system for fast and easy lens changing with complete lens seal Injection Molded Polycarbonate under extreme pressure to create a precise contour of optically correct geometry Fixed outrigger attachments engineered to fit with most helmets PRIZM Prizm is a revolution in lens optics built on decades of color science research. Prizm lenses provide unprecedented control of light transmission resulting in colors precisely tuned to maximize contrast and enhance visibility. Ridgelock Designed with Oakley's Ridgelock Technology, changing lenses is quick and easy while still allowing for a complete lens seal to prevent harsh conditions from penetrating into your goggle. High Definition Optics® High Definition Optics® (HDO®) is a collection of patented technologies that allow Oakley eyewear to meet or exceed the testing standards of the American National Standards Institute for optical clarity, visual fidelity, and impact resistance.