Revo Efflux Sunglasses Brown Frame Polarized Bronze Lens Made in USA Metal frame Glass lens Polarized Anti-Reflective coating Lens width: 61 millimeters Bridge: 17 millimeters Arm: 135 millimeters 1.8mm thin glass lenses reduce unnecessary weight, while maintaining the scratch resistance of glass. Bronze lens yields 9.4% light transmission. Anti-Reflective coating eliminates light that is reflected off the inside of a lens from the surrounding environment Element Shed lens coating that makes sweat, oil, dirt, etc. from sticking to the lens surface Revo Polarcast blocks glare off flat surfaces like water, snow and the road Metal alloy made of copper, nickel and zinc to create a lightweight and corrosion-resistant frame. Spring Hinges for a comfortable and flexible fit. Size: 61-17-135 mm