Different colors of mirrored ski goggles have different parameters, among which light transmittance is a very important parameter. Ski resorts environment variable, lighting and even can change greatly in a day, in addition to the color-changing the all-weather lenses, other lens all want to be a winner-take-all weather conditions is basically impossible, usually you can choose two lenses or more than two lenses to adapt to different climate weather caused the light of the environment. So in the purchase of snow mirror, light transmittance is the first we should consider the technical parameters.