Maui Jim lenses protect block 100% of all harmful UV rays and 99.9% of glare. The complex lens technology feature several layers of polarization. The two most outermost layers are a waterproof and oleophobic coating. This oleophobic coating repels grease, making the inside and outside of the lens water and oil proof. The lens also has anti reflective treatment, which prevents against bounce back glare, or UV light that is reflected off of the back of the lens. The next layers consist of a CLEARSHELL® scratch resistant treatment surrounding two layers color enhancing lens. The centermost layer is a polarizing film, which makes it possible to see below the surface of the water.