Optic Nerve Photochromatic Exilis PM Sunglasses, Shiny Black, Rose/Smoke Lens Changes from light to dark in 7 seconds 100% UV Protection to protect your eyes from harmful UV light Our fully adjustable alloy bridge component includes Tactilite rubberbridge rests; This performance combination provides a customizable fit,as well as improved security and comfort during aggressive, highvelocity sports and activities Tactilite Rubber Components;This advanced rubber compound reduces slippage when worn and continuesto perform even when engaged in activities with a high perspirationfactor Limited Lifetime Warranty