OTS (Over the Spectacle) Safety Glasses by PowerPak are designed to provide a comfortable, snug, and superb fit with prescription eyewear. The lightweight nylon temples adjust for length and pitch and ensure a customized fit. The single-lens design encapsulates the eye region to help protect it from harm as well as excessive glare. Constructed with heavy-duty polycarbonate, the lenses are equipped with a scratch-resistant coating. OTS safety glasses fit easily over frames of up to 137 mm width and 44 mm height. The safety glasses also protect against harmful UV rays and numerous airborne hazards at the workplace.