A polarizer is a lens that allows only light in a particular polarization direction in natural daylight to pass through. Because of its filter light, wear them to see somethings will become darken. In order to filter the sun shines from the water, land or snow on the equal direction of the glare of light, the lens to add a vertical special paint, called polarized lenses. It’s your best choice for outdoor sports (Such as Marine activities Driving, Skiing or Fishing)