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Choose the Right Lens

Choosing the right lens for the conditions you will encounter is key!


In snowy terrain you need lenses that can balance and partially reduce blue light. Snow reflects the sky, so the eyes are overwhelmed by blue light and it is difficult to read the shades of the snow.

Visible Light Transmittance

When there is low light, you need an lens that allows a lot of visible light to be transmitted to the eye. In strong sunlight, you need a lens that blocks a larger portion of visible light. This is what is called VLT – Visible Light Transmittance.

The higher the percentage, the more visible light is transmitted through the lens, and the opposite. Lenses for downhill skiing are tested and categorized in to 5 categories based on VLT.

Ski gogle lens/filter categories.


Cat 0 – Snowy, foggy, and overcast conditions, or sunset/nighttime use
Cat 1 – Cloudy weather and low light conditions
Cat 2 – Sunny and partially cloudy conditions
Cat 3 – Bright and sunny conditions
Cat 4 – Extremely bright and sunny conditions

Female skier in midningt sun in Riksgränsen wearing Fluga goggles.


In cloudy weather and low light conditions...
...choose Filter Category 1

Overcast ski slope in Åre.

In cloudy weather and low light conditions – you need a contrast enhancing lens that decreases blue light and increases orange and red. The correct lens must have a high Visible Light Transmission value to pass enough light to the eye in overcast and difficult conditions.

The orange contrast enhancing lens without mirror.

ZEISS orange contrast enhansing lenses.

male snowboarder in Riksgränsen wearing Fluga goggles.


In sunny and partially cloudy conditions...
...choose Filter Category 2

Mont Blanc with sun and clouds.

In sunny and partially cloudy conditions - you need an all-round lens. A lens that both enhances contrast and that lets enough light pass through. Moving from shade to sunlight you need a lens that can do all.

The orange contrast enhancing lens with Multi-Layer Blue Mirror is our “lighter” lens for all around use.

Orange contrast enhancing lenses by ZEISS with blue mirror.


The orange contrast enhancing lens with Multi-Layer Gold Mirror is our “darker” lens for all around use.

Orange contrast enhancing lenses by ZEISS with gold mirror.

Snowboarder in ski lift in Riksgränsen wearing Fluga goggles.

In bright and sunny conditions...
...choose Filter Category 3


Sunny bright snowy mountain in Riksgränsen.In bright and sunny conditions – you still need to have help with the contrast in some spots, but you need a dark lens which blocks out even more light.

Orange contrast enhancing lens with Super Silver Mirror. Our darkest lens.
Orange contrast enhancing lenses by ZEISS with silver mirror.

ZEISS lenses only

We have chosen to work with ZEISS lenses only. Now it's your choice – which are the right lenses for your adventure?