NiSi Filter CPL Circular Polarizer Pro Nano Huc helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface. The light from the sun naturally becomes partially polarized due to reflecting off electrons in air molecules, causing the light to scatter into what appears as haze. A polarizing filter arranges, and filters, this directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of this light. This results in a noticeable reduction of glare and reflections from non-metallic surfaces and an increase in the saturation of skies and foliage. Waterproof and Nano Coating Ultra High Definition Ultra Slim Frame, only 4,9mm Eliminates Reflections and Glare Greater Color and Tonal Saturation, reduces Haze in Landscapes