The DEWALT Reinforcer Rx Safety Glass combines safety glasses with a reading glass. Magnification diopter molded directly into safety lens. Magnification diopter is molded into the polycarbonate lens creating a safety glass and Reading glass all-in-one. Handgrip pattern on temple is ergonomically positioned for secure grip.Soft, rubber non-slip nosepiece provides maximum all day comfort. Rubber tipped temples with belt ribs keeps glass securely in place.Tough, polycarbonate lens is impact resistant.Distortion free lens provides fatigue free use.Safety glass exceeds ANSI Z87.1+ standards Povides 99.9% UVA/UVB protection.