FLIP-UP TYPE It’s a unique polarized uni-lens glasses that can be worn over an existing eyewear or wear alone and can be flipped down to block blinding glare or flipped up when not in use. BLOCKS GLARE & IMPROVE VISION It is designed with polarized lenses with light filtering technology that can improve visual clarity and block blinding glare from day light. EXTRA DURABLE Made of thick frames that will be unlikely to snap, along with Bell and Howell lenses that are known for the precision and quality, it may last you for years without incurring any damage Light-Filtering Improves visual clarity even under low light conditions and sharpens colors or edges of objects. 1-Size-Fits-All : Sits firm and tight when worn.