The Outfitter Safety Sunglasses will fit over most prescription glasses and the lenses conveniently transition from clear to smoke in the sunlight. These stylish safety sunglasses feature cutting-edge technology that goes above and beyond UV protection, offering protection from 99 to 100 percent of harmful light. They have also earned an ANSI Z87.1-2010 Standards for use in industrial applications rating because they have endured extensive testing for optical clarity, impact resistance and proper eye coverage. The matte black nylon frame features high flexural strength and superior wear resistance with fabric covered, airy foam for maximum comfort. The lenses are of shatterproof polycarbonate with a scratch-resistant and double-sided anti-fog coating. This durability allows them to withstand forces that would damage other eyewear. A strap and micro-fiber pouch for safe cleaning and storage are included.