Delta Plus RX-500™ safety glasses are the only glasses to have a full lens magnifier built into a Ballistic Rated 9 base wraparound polycarbonate lens. The lens fully magnifies work areas making workers more productive by reducing eye strain and fatigue by not having magnification or trying to focus through inconveniently placed bifocals. Also increases visual precision during close work tasks in front and above worker. Features a soft, flexible nose bridge minimizes slippage and provides all day comfort and soft tip flexible temples to keep eyewear comfortable and secure. Great for welding, electrical and any stationary close assembly applications above and front of workers. Ballistic V™ rated* for impact protection, 7x ANSI Z87+ energy. (4x Z87+ impact velocity).