Oakley's Switchlock technology lets you easily, quickly, and securely change out lenses for ultimate adaptability to differing light conditions and activities. The RadarLock XL Replacement Lens comes in a variety of tints, some featuring Oakley's HDPolarization and some featuring vision-optimizing Iridium coatings. Vented lens designs provide optimized airflow and are ideal for high aerobic sports like running and cycling. Proposition 65 Warning for California Consumers: This product contains chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm.