Flip off your stepdad like never before in the improved Flip-Off 2.0. Smoother Flip-Up Technology(TM), grippier ear and nosepieces, and a more aggressive lens angle enhances sport performance and optical intimidation levels. Now available in two sizes so all head volumes can swing for the benches. Lens: Standard Polycarbonate Lens Coatings: Hydrophobic Look thru color: Brown Light transmission: 15.1%, CAT 3 100% 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 Tie Downs(TM) Retainer Strap 1 Limpcloth(TM)