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Sunglasses For Sport sell a wide range of Category 4 sunglasses – probably the largest selection available in the UK. But what are they and where are they used? What are Category 4 sunglasses The lens category number equates to a percentage of the VLT (Visible Light Transmission) that is, how much light the lens lets through. The higher the VLT the lighter the lens, and conversely the lower the VLT the darker the lens tint will be, blocking more light coming through to the eye. A Category 4 …

We’ve just got back from exhibiting at the UK’s largest field sports event celebrating its 65th year: The Game Fair held at Ragley Hall near Stratford upon Avon. wp:image {"id":118548,"width":400,"height":500,"sizeSlug":"full","linkDestination":"none"} /wp:image Adam Henson, Britain’s best-known farmer and long-standing BBC Countryfile presenter, popped onto our stand. He visited us last year and bought a pair of Serengeti sunglasses which he said he loves. He wanted a pair for more every …

If your summer holiday plans mean spending time on or near to water it’s a good idea to have polarised lenses for your sunglasses. You might have wondered how polarised sunglasses work and what causes glare on water. wp:heading Polarised Light /wp:heading Light is made of particles called photons, which travel through space like a wave, zig-zagging back and forth on their way to your eye. Natural, unpolarized light consists of photons bouncing in many directions at once. But as soon as t …