The Bliz NOVA ULS PHOTOCHROMIC with mirror-coloured lenses are made of highly resistant X-PC material. The lens changes colour depending on the light conditions. As UV rays increase, the lenses darken and vice versa. The glass also has hydrophobic and oleophobic coatings that disperse water droplets and impurities. Of course there are Anti-Fog and Anti-Scratch treatments to reduce the possibility of scratching and fogging the lens. The lens uses Bliz Ultra Lens Science - 9 functions in one. A unique solution where two lenses are laminated into one.