huge field of vision, super-fast lens change system. you can only make out your line if you can see where it's going. putting on the smith i/o magâ„¢ xl goggle is like flipping a switch from normal to extra widescreen. chromapopâ„¢ lens technology enhances colour and contrast so you can see the terrain in front of you as clearly as possible. the quick and easy magâ„¢ lens change system means you always have the right lens tint for the conditions. chromapopâ„¢ sun blackthe more you see, the more you experience. smith's superior chromopopâ„¢ technology enhances the clarity of natural colours so you can see more detail without straining your eyes.transmittance of visible light: 12 %chromapopâ„¢ storm yellow flashthis lens is perfect for very cloudy days. it increases contrast and ensures a clear view, even on the darkest days.transmittance of visible light: 65 %