UV Activated Transitioning LensesClearEyz Photochromic Sunglasses adjust to different light conditions to provide improved visibility and help to reduce eye strain. The light-adaptive lenses transition from light to dark and back again based on changes in brightness. These stylish sunglasses shield the sun’s harmful rays, providing 100% UVA/UVB protection. Provides the perfect amount of tint at all times. FeaturesSelf-tinting and UV activatedProtects eyes from harmful UV raysProvides improved visibility and reduces fatigueAnti-scratch coatingOne size fits mostBlack onlyIncludes 1 X Photochromic Sunglasses, 1 X Zippered Case, 1 X Photochromic Test Card, 1 X Cleaning Cloth