Canasafe 20540 opTiviz Wrap-Around Protective Eyewear is a single piece lens that is easy to clean after a massive work at the field. Fits most face sizes in the globe. The 99.9 UV at the lens, protects your precious eyesight from the harmful ray of the sun. Most industries prefer such spectacle, lightweight, anti-fog and have an economical prize. The fit of the brow to temple is perfectly cut for you and your buddies.