Boundless Sunglasses Black 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. Available with polarization, which blocks over 99% of surface glare and is layered and sealed within SPY’s lenses to prevent scratching, delaminating, and hazing of your polarized filter. Constructed of Bioplastic, which is comprised of 50% organic plant matter that is both lightweight and durable and aids in reducing plastic consumption. Snap hinges provide a secure, comfortable fit. 100% UV protection reduces eye fatigue and long-term sun damage. Frame measures 53-19-148 670000000118