|The Astrospec OTG 3001 safety spectacles are designed to fit over prescription eyeglasses. Patented adjustable lens inclination and adjustable temple length offer on-size-fits-all flexibility. Stylish and durable, Astrospec 3001 safety spectacles feature lightweight, impact-resistant nylon frames and a one-piece replaceable polycarbonate lens for maximum protection. Lens is coated with a scratch-resistant Ultradura hard-coat that absorbs 99.9% of UV radiation. Polycarbonate brow guard and side shields provide added protection against UV, dust and flying particles. Meets ANSI Z87.1-1989 and CSA Z94.3-1992 Standards.