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Koo Spectro sunglasses



These quality glasses offer a bold design and strong performance, though they are expensive
Good looking
Don't mist up
Good clarity
Slight obscuring of peripheral vision

At every product is thoroughly tested for as long as it takes to get a proper insight into how well it works. Our reviewers are experienced cyclists that we trust to be objective. While we strive to ensure that opinions expressed are backed up by facts, reviews are by their nature an informed opinion, not a definitive verdict. We don't intentionally try to break anything (except locks) but we do try to look for weak points in any design. The overall score is not just an average of the other scores: it reflects both a product's function and value – with value determined by how a product compares with items of similar spec, quality, and price.

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The Koo Spectro sunglasses are striking to look at, the lenses offer great clarity, and fogging is minimal. They come at a price but are impressive nonetheless.

In my eyes (over my eyes?), the Spectro glasses are very good looking, but glasses are not simply for show – performance should be the key factor. I'm happy to report that these Koo sunnies, with their Zeiss lens, anti-slip elastomer gripper and well-designed vents, offer clarity of vision, sit securely on the head, and either prevent fogging or clear quickly.

> Buy these online here

The most important element of any pair of glasses is clarity, and the Zeiss Polycarbonate single lens does a great job here. The bronze lens that the glasses came with, with a VLT (visible light transmission) of 12%, offers excellent clarity of vision, especially for rides with the sun lower in the sky and the light more patchy. I found it simple to pick out wet patches, drain covers and so on, which can often be tricky at this time of year.

2020 Koo Spectro sunglasses.jpg

The field of vision is very good too, although there is slightly more infringement on your peripheral vision than other large full frame glasses I use, such as Oakley Jawbreakers and Roka CP-1s. That said, I didn't ever find that I was struggling to shoulder check effectively or missing anything beside me, so it's a minor issue.

2020 Koo Spectro sunglasses - worn 2.jpg

Thanks to the anti-slip MEGOL elastomer material on the nose grippers and arms, the glasses stay firmly in place without moving.

2020 Koo Spectro sunglasses - inside.jpg

Ventilation comes from four vents, two at the top of the lens and two at the bottom. These stop fogging effectively, even at slow speeds, and on the odd occasion when they do fog, the venting allows them to clear quickly. The vents are also relatively subtle, so they don't have too much impact on the aesthetics of the glasses.

2020 Koo Spectro sunglasses - front.jpg

The glasses hit the Scales of Truth at 35g, which is about what I would expect for a full-frame set of glasses in this price range. That means they can sit on your ears and nose for a long time without causing irritation.

With an rrp of £169 the Spectros aren't cheap, though they are by no means the most expensive we've seen. For instance, the Rudy Project Defender ImpactX Photochromic 2s that I tested in 2019 are £20 more (and only 1g lighter).

> Buyer’s Guide: 13 of the best cheap cycling sunglasses

The 100% S3 MAAP glasses that Liam tested last summer are just £1 more, and 1g lighter, but are not quite full frame.

> Buyer’s Guide: 31 of the best cycling glasses

I really like the Koo Spectro glasses. They look good, perform well, and are comfortable to wear for several hours. The big, bold design won't be for everybody and they are on the expensive side, but this is more than made up for by their other qualities.


These quality glasses offer a bold design and strong performance, though they are expensive test report

Make and model: Koo Spectro sunglasses

Size tested: n/a

Tell us what the product is for and who it's aimed at. What do the manufacturers say about it? How does that compare to your own feelings about it?

Koo says, "With on-point styling and huge panoramic vision courtesy of a broad lens, the new KOO Spectro are the perfect performance cycling and multi-sport sunglass."

This is a pretty accurate description of these glasses.

Tell us some more about the technical aspects of the product?

Koo lists:

- Uncompromised clarity with a Zeiss Polycarbonate lens

- Panoramic vision with a single-lens frame design

- Minimized fogging with 4 ventilation ports

- Anti-slip MEGOL elastomer temple inserts provide added grip and comfort

Rate the product for quality of construction:

Very well made, with good quality materials combined with sturdy hinges and grippers.

Rate the product for performance:

Performed very well, offering excellent protection, ventilation, and comfort on the head.

Rate the product for durability:

The hinges feel high quality, the lens isn't easy to scratch, and the material used feels robust.

Rate the product for weight (if applicable)

A decent weight, about where I would expect a full frame set of glasses in this price range to be.

Rate the product for comfort (if applicable)

Very comfortable for longer rides thanks to effective grippers combined with an adjustable nose insert.

Rate the product for value:

Not cheap, but not the most expensive either.

Tell us how the product performed overall when used for its designed purpose

Very well: they stayed on my head nicely, didn't fog easily, and offered clarity of vision.

Tell us what you particularly liked about the product

The bold design – I think they look fantastic.

Tell us what you particularly disliked about the product

There is slightly more obscuring of your peripheral vision than with some similar full frame glasses.

How does the price compare to that of similar products in the market, including ones recently tested on

Not cheap, but not the most expensive we've tested... The 100% S3 MAAP glasses that Liam tested back in June are just £1 more, and 1g lighter, though they aren't quite full frame. The Rudy Project Defender ImpactX Photochromic 2 Blacks are £20 more expensive (and only 1g lighter).

Did you enjoy using the product? Yes

Would you consider buying the product? Yes

Would you recommend the product to a friend? Yes

Use this box to explain your overall score

A really good looking and comfortable pair of glasses that perform well. They aren't the cheapest and there is a slight obscuring of your peripheral vision, but this is more than made up for by their clarity, fit and anti-fogging. Plus their looks...

Overall rating: 8/10

About the tester

Age: 32  Height: 6 ft  Weight:

I usually ride: CAAD13  My best bike is: Cannondale Supersix Evo

I've been riding for: 5-10 years  I ride: Every day  I would class myself as: Expert

I regularly do the following types of riding: commuting, club rides, sportives, general fitness riding, fixed/singlespeed, mtb,

George is the host of the podcast and has been writing for since 2014. He has reviewed everything from a saddle with a shark fin through to a set of glasses with a HUD and everything in between. 

Although, ironically, spending more time writing and talking about cycling than on the bike nowadays, he still manages to do a couple of decent rides every week on his ever changing number of bikes.

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majstermod | 2 years ago

Hi George,

could you please tell more about KOO glass maintenance and cleaning?

I ride in all conditions, including rain, snow, freeze, fog both on the road and on muddy trails.

I've been using Shimano glasses for years and in case they got wet or muddy I could wipe them easily with glove, seleeve or even bare hand with great result. No fingerprint left on glass, mud trace or water drops. Also no scratches afterward. The same applies to all glasses delivered by Shimano: transparent, dark and photochromic.

Recently I bought Oakley Sutros with transparent glass to ride in the evening. They are just teribble. One finger touch and vision gets really blurry. There is no way to clean them on the road, not to mention in the muddy forrest. I had dificulties to remove fingerprints using professional photo cloth.

Are KOOs any better than Sutros in the rain, or while sweating heavily on long ascend?

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