Mirror coating offers improved sun protection, durability & scratch resistance. Sporty, lightweight wrap design offers maximum coverage. Rubber non-slip nose pads for ultimate comfort. 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. 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.