Polarized lenses eliminate glare for clearer vision & reduced eye fatigue without color distortion Removable, vented TPU side shields block light & provide additional protection Built-in nose pads lay flush to prevent hair snagging or pulling when wearing on your head Injected front & rubber non-slip temples keep the frames lightweight & firmly on your head TR90 frames are durable, flexible, hypoallergenic & impact-resistant Auto-lock stop hinge allows the temples to lock securely in place for a sturdy fit HEADS UP! Colorway 991 is not suitable for driving/operating a vehicle due to category 4 lens visibility 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