Julbo Aerospace Reactiv High Mountain Goggles Cat 2-4

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Really good goggles for high altitude mountaineering, that adjust from Cat 2 - Cat 4 and have a brilliant venting system to prevent steaming up.

Julbo Aerospace Reactiv High Mountain Goggles Cat 2-4

Black/Grey Polarised Standard
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A very comfortable photochromic goggle that deals with the problems of steaming up when climbing by having a clever lens that can be clicked forward with gloved hands to allow air in all round the edge of the lens and then clicked back into place for the descent - all without taking it off your head.

This version has a Photochromic "Reactiv" lens (adjusts from cat 2 to cat 4 - Visible Light Transmission 20% to 5%), for very bright glary conditions and high altitude.

  • SuperFlow System enables the screen to edge forward for greater ventilation, while remaining perfectly protected from the sun's rays. 
  • Automatic adjustment from Category 2 to Category 4.
  • Polarised to reduce glare.
  • Spherical screen and minimalist frame for a huge field of vision.
  • Sized to fit medium to large heads.

Really good goggles for mountaineering in the greater ranges.

Category        Usage
0 Not really a category - transmits 100% of visible light. Protection against grit and ice only. 
1 43% - 80% visible light transmitted. Suitable for use in cloudy conditions with virtually no direct sunlight eg blizzards and whiteouts 
2 18% - 43% visible light transmitted. Suitable for use as general sunglasses and in cloudy conditions in the mountains, but not in direct sunlight in mountain areas where there will be a lot of reflection off snow and ice.
3 8% - 18% visible light transmitted. Suitable for Alpine and Himalayan mountaineering for most uses, but for prolonged exposure at high altitude Category 4 is recommended.
4 3% - 8% visible light transmitted. For prolonged exposure at high altitude and especially if you have weak eyes. Will be found too dark for everyday use and should not be used for driving a car.

*Categories 3 and 4 are the only categories suitable for Alpine and Greater Ranges mountaineering.

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