Bloc X400 Chameleon Shiny Black with Category 4 Lenses Bloc X400 Chameleon Shiny Black with Category 4 Lenses
Bloc X400 Chameleon Shiny Black with Category 4 Lenses without guards Bloc X400 Chameleon Shiny Black with Category 4 Lenses without guards
Bloc X400 Chameleon Shiny Black with Category 4 Lenses Bloc X400 Chameleon Shiny Black with Category 4 Lenses
Bloc X400 Chameleon Shiny Black with Category 4 Lenses
Bloc X400 Chameleon Shiny Black with Category 4 Lenses without guards
Bloc X400 Chameleon Shiny Black with Category 4 Lenses

Bloc X400 Chameleon Shiny Black with Category 4 Lenses

£45.00
Multifunctional category 4 glacier glasses with removable side pieces designed to protect from peripheral light incursion and secured by a revolutionary globally patented micro-magnet system.

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Bloc X400 Chameleon Shiny Black with Category 4 Lenses

Bloc X400 Chameleon Shiny Black with Category 4 Lenses RRP:
£45.00
1 In Stock

Multifunctional category 4 glacier glasses with removable side pieces designed to protect from peripheral light incursion and secured by a revolutionary globally patented micro-magnet system.

They transform from pure mountain sport to street level by simply removing the side pieces and reshaping the malleable arms.

Conforms to EU Standard BS EN 1836 : 2005 + A1:2007.

NB Category 4 glasses are not considered suitable for driving as they are too dark.

Sized for Medium to Large heads.

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 - however, just because the lenses are suitable does not mean that the design of the glasses is.

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