Category 4 Sunglasses

If you need sunglasses to withstand high altitude trekking or mountaineering, BLOC category 4 sunglasses are the ideal choice. Glare can be intense at this high an altitude so it’s imperative that you have the right lenses to suit your surroundings. The BLOC category 4 sunglasses range includes the Chameleon, high performance eyewear designed for high-intensity environments.

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