Sealed Eye Protector come with the protection of of ANSI Z87+ for complete eye protection from debris, wind, and dust. They are perfect safety eyewear to use in manufacturing facilities where small particles of dust, metal, or sand that might get blown into the eyes. These foam sealed safety glasses come with a removable foam insert that provides extra cushioning and seal to the eye area and contours to the face. They also provide a micro venting area that allows the eyes to breath and the lens to remain clear of fog. The lens provides greater than 99% protection of UV and UVA sun rays. You can keep these framers glasses around your neck or adjust the tension of the soft nylon strap.