Ergodyne - EGO55101 Skullerz Osmin Safety Glasses feature an Over-the-Glasses (OTG) wraparound lens for a wide field of vision and seamless fit over prescription frames. Polycarbonate lenses protect against impacts and filter 99.9 percent of harmful UVA, UVB and UVC rays. With 95 percent Visual Light Transmission (VLT), clear lenses work well in indoor, low-light and nighttime conditions. Nonslip frame features a nylon and soft rubber design for added durability and flexibility while a molded-in brow guard and side shields provide enhanced protection from debris. Integrated brow venting enables airflow for all-day comfort. To provide a custom fit on a variety of faces, the rubber temples can be easily bent and re-bent for a custom, secure fit. Built-in, soft rubber guards on the frame and temples protect prescription frames and lenses from constant movement and harmful scratching that can occur with some over-the-glasses safety glasses.