Bloc Beck

£40.00

The Beck sunglasses from Bloc are ideal for all activities. Category 3 blue mirror.

Bloc Beck

Blue Mirror
£40.00
2 In Stock
Red Mirror
£40.00
1 In Stock

The Beck sunglasses from Bloc are ideal for all activities. They are engineered to enhance performance and provide total protection and are suitable for everyday wear thanks to their durable, lightweight design and Karbon TX bi-core injected structure.

Fitted with non slip adjustable nose pads and soft grippy bi-moulded temples, they are designed for comfort and fit. The distortion free, impact resistant XTR Karbon8 optical class 1 lenses provide maximum protection against UVA, UVB and other harmful light up to 400nm.

Category 3 blue mirror lenses 18-8% light transmission, heavily tinted on a grey base for bright to extremely bright light conditions.

Tested to BS EN ISO 12312-1:201.

Category        Usage
0 Not really a category - transmits 100% of visible light. Protection against grit and ice only. 
1 43% - 80% visible light transmited.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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