Frequency - made to work with both no headwear, and with different kinds of helmets. They offer a wide, panoramic view.
The visible light transfer offered by the photochromic lens varies between 13% and 72%, thus offering protection between cat1 and cat3.
Julbo has been making sunglasses for more than 135 years. By buying Julbo, you are investing in a quality product and can rest assured the glasses offer perfect UV protection.