Front Line MX is the latest addition to Oakley's High Impact line of goggles. With a large to medium sized fit, Front Line MX is optimized for a wide variety of faces and is engineered to fit perfectly with most helmets. 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. Discreet frame notches at temples provide compatibility with most prescription eyewear. Performance: Prizm™ lens technology (select models). Ridgelock lens technology. Rimless lens design for large peripheral view. Fully integrated Race-Ready roll-off system with increased film height for expanded field of view in muddy conditions included. Comfort: Streamlined frame design provides wide peripheral visibility.