Class 0: filters only 0 to 20% of light / Night vision or very cloudy weather.

Class 1: filters 20 to 47% of light. The lens is slightly colored, recommended for cloudy or grey weather and low sunshine.

Class 2 : filters 47 to 82% of light. Medium colored lens, good for weather with low light.

Class 3 : filters 82 to 92% of light. Dark lens, recommended for clear weather with strong light.

Class 4 : filters 92 to 97% of light. Very dark lens, recommended for sunny weather (high mountain, alpinism).

Photochromic 1 to 3: Versatile lens that can adapt to varying light conditions from class 1 to 3. It filters between 20% and 92% of visible light. Suitable for all conditions you may encounter in a ski resort.

Photochromic 2 to 3: Versatile lens that can adapt to varying light conditions from class 2 to 3. It filters between 47% and 92% of visible light. Suitable for all conditions you may encounter in a ski resort.

Photochromic 2 to 4: Versatile lens that can adapt to varying light conditions from class 2 to 4. It filters between 47% and 97% of visible light. Suitable for all conditions you may encounter in a ski resort or for high alpine skiing in extreme conditions.

Jones ski poles