ARC (Accurate Radius Curvature) polycarbonate lenses are tapered to follow the natural curvature of the eye, providing crystal-clear distortion-free vision while reducing eyestrain Constructed of Bioplastic, which is comprised of 50% organic plant matter that is both lightweight and durable and aids in reducing plastic consumption Smooth and sturdy screw hinges 100% UV protection reduces eye fatigue and long-term sun damage Frame measures : 59-16-135 mm