How to Choose Your Cycling or Running Sunglasses?

You can cycle or run in any weather conditions. Sun, rain, fog... but to ensure you can see clearly throughout, you'll need to protect your eyes with a pair of sunglasses from the appropriate lens category.

First thing’s first, what does ‘lens category’ mean? It’s the index of glare protection , which ranges from 0 (the lightest lens) to 4 (the darkest lens) and there’s a lens category for every weather condition.

Basically, the brighter the outdoor light, the more glare you get, and the darker the lens should be. And the darker the sky, the lighter the lens should be to allow proper vision.

For cycling and running, choose category 0, 1, 2 or 3 lenses, depending on the sunshine intensity.

Warning! Category 4 lenses must not be used for road driving. These heavily tinted lenses are only for high mountain and sea conditions, where the sun rays are more intense.

For rainy conditions or at night .

Very low brightness outside.

Full UV protection.

For cloudy or foggy conditions.

Low brightness outside.

Full UV protection.

For partly sunny weather conditions.

Average brightness outside.

Full UV protection.

For sunny weather conditions.

Bright outside conditions.

Full UV protection.

Weather is changeable – especially if you live in the UK! – and if you cycle or run regularly, you'll need to be prepared for bright or cloudy skies. That's why opting for sunglasses with interchangeable lenses may be the best option for you.

That just means you'll have a frame with several sets of lenses that fall into various categories. Before going out, you just need to clip or lock the appropriate lens category onto the frame. Certain sunglasses may be sold with one, two or even three additional pairs of lenses.

If you liked the idea of interchangeable lenses, wait till you read about photochromic lenses: lenses with a variable tint . Depending on the light conditions, the lens automatically and continuously adjusts its tint. The lens category changes progressively, without the need to change the lenses.

Like we said before, the weather can be unpredictable and it’s likely you’ll be moving between overcast and sunny areas within a matter of minutes on your bike or when you’re running, so it’s not always convenient to have to choose one single lens category. With photochromic lenses, you don't have to worry about choosing the appropriate lens tint, the photochromic lenses with automatically adjust it's tint to what you need.

For cycling and running, photochromic lenses usually vary from category 1 to 3 , in order to adapt to as many light conditions as possible.