The Uvex Horizon flip-up is ideal for welders and industrial workers who require a shaded lens while working with high intensity light sources, and a traditional (Rx or non-Rx) clear impact-resistant polycarbonate lens when their task is complete. These are well-constructed, durable, lightweight frames that allow for greater comfort for longer wearing time. Available in Shade 3.0, Shade 5.0 and Cobalt Blue. Meets ANSI Z87+ (High Impact) standards.