Manufacturer's description:Adapt to changing light conditions or just change your look by switching to a different lens in seconds. Choose the shape and color to optimize your performance, and select a vented design if you want cooling airflow. Lenses with Iridium® coating precisely tune the transmission of light for your environment. Non-vented lenses are available with polarization to block the blinding rays of glare. Oakley polarization eliminates the haze and distortion found in conventional technologies to create the best polarized optics on the planet.PRIZMROADA revolutionary lens technology that fine-tunes vision for specific sports and environments. Prizm Road lenses enhance the road so you can see obstacles like rocks and potholes quickly and feel more confident as you ride.