Photochromic Sunglasses - Category 2 to 4

What use is anti-UV material?To protect your eyes from an invisible danger... UV rays.UV radiation is always present, in winter or in summer, in sunny weather or even overcast and it can be harmful to your eyes and their contour.To help preserve your vision, our sunglasses lenses are made from polycarbonate blended with “anti-UV” material which protects you from harmful sun rays (UVA and UVB).

Photochromic Reactive Lenses 2-4 with high speed activation and deactivation (cat.2 to 4 - visible transmission rate:7% - 35%): they darken or lighten according to the light and adapt to any time of the day.Internal anti-fogging treatment and oleophobic treatment on the outside (prevents soiling, helps cleaning and encourages water to slide off the lens).

Categorisation of tinted lenses according to the ISO 12312-1 standard:- Category 1: slightly tinted lens for reduced solar luminosity.- Category 2: medium tinted lens for medium solar luminosity.- Category 3: dark lens for heavy solar luminosity (sea and mountains).Between 82% and 92% of visible light absorbed- Category 4:very dark lens for exceptional solar luminosity (high altitude).Between 92% and 97% of visible light absorbed