Polarized lenses eliminate glare for clearer vision & reduced eye fatigue without color distortion Built-in rubber nose pads lay flush to prevent hair snagging or pulling when wearing on your head Laser engraved temple tips for added comfort & stability TR90 frames are durable, flexible, hypoallergenic & impact-resistant Auto-lock stop hinge allows the temples to lock securely in place for a sturdy fit Adjustable temples auto-form around your head for a gentle grip & custom fit Temple tip holes for easy paring with most lanyards WARNING: This product can expose you to chemicals including Nickel (Metallic) which is known to the State of California to cause cancer, and Bisphenol A (BPA) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov