The Flight Optics, Pit Viper&';s Dual Lens Technology(TM), sunglasses for the sky. Exit Row Comfort and Cockpit Clarity make this airport accessory the only First Class Pit Vipers. Lens: HDPV Polarized Polycarbonate Look thru color: Grey Light transmission: 13.5%, CAT3 100% UVA + UVB protection No-slip-grip rubberized touch points DO: Clean your Pit Viper Lenses with the Limpcloth(TM) (included with every pair of Pit Vipers) and hot mouth breath, or Snake Oil Lens Cleaner (sold separately). DO NOT: Clean your Pit Viper lenses with bleach, dish soap, household chemical cleaning products, salt water, sandpaper, sweat, or other bodily fluids, mysterious or other. What&';s in the Box 1 Pair of Pit Vipers 1 Firmcase(TM) 1 Limpcloth(TM)