The "Category - CAT" number indicates the level of light transmission in the visible range. How clearly and extensively you can perceive your surroundings largely depends on the lens you choose.
Lens VOLT
The VOLT offers flexibility and versatility with replacement lenses offering filter categories for all conditions. There are a total of 6 lens colours available. The simple and easy technology allows you to quickly and easily change the lenses of your sports sunglasses.
The black lens (CAT. 4) is polarised and consists of a THC material that blocks dangerous UVA and UVB rays and offers excellent protection for your eyes when exposed to high levels of radiation.
All other lenses (CAT. 0, CAT. 1, CAT. 2 and CAT. 3) are made of polycarbonate and offer UV400 protection. The Nano HD coating allows you to see contrasts in all lighting conditions as well as repel water droplets on the lens.
The VOLT are your perfect companion for all outdoor sports such as cycling, running and ski touring. Enjoy the ultimate flexibility and adaptability.
⚡️ Learn more about the different lenses and their suitable conditions in the table below.
Lens Colour |
Category |
Suitable Conditions |
Light Transmission / VLT (Visible Light Transmission) |
Clear (non-polarised) |
CAT. 0 |
Night or dull & rainy days with very low light conditions |
90% VLT |
Purple/Green (non-polarised) |
CAT. 1 |
Trails in the forest with a lot of shade |
53% VLT |
Orange (non-polarised) |
CAT. 1 |
Cloudy, foggy or overcast conditions |
53% VLT |
Red (non-polarised) |
CAT. 2 |
Cloudy & Partly Sunny - changing conditions |
23% VLT |
Blue (non-polarised) |
CAT. 3 |
Sunny |
16% VLT |
Black (polarised) |
CAT. 4 |
Super Bright Sunshine |
6% VLT |