ERBx glasses features are ultimate in bifocal safety glasses. The adjustable temples come with 3 notch settings. They also feature ratcheting up/down temples with 2 position settings. ERBx glasses also include a black spectacle strap to help ensure they never fall off. The hard coated polycarbonate lens offers 99-Percent UV protection, meaning they absorb more than 99-Percent of harmful ultraviolet radiation. The hard coating on the lenses helps them resist scratches in abrasive environment and help to extend the lens life. It features an 8 base curve with dual lens. These safety glasses meet the requirements of ANSI Z87.1 for high impact.