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Brynje Super Micro C-shirt base layer



Comfortable base layer that is effective at keeping you dry on hot rides, and copes well with cooler temperatures.

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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Norwegian company Brynje specialise in mesh base layers. The Super Micro C-shirt here is made for warmer conditions, taking the mesh fabric concept at the heart of their base layer range and tailoring it to suit warmer conditions.

Fortunately we've had enough of that sort of weather to really put the Super Micro C-shirt through its paces. Once you get past the looks, and your other half has stopped laughing at you in the bedroom, out on the bike it proves to be an excellent base layer.

It works well to keep you dry when it's hot and you're pushing hard on the pedals. The tighter knit of the polypropylene material improves ensures good ventilation, and it worked well to keep the sweat moving away from the skin. There are better base layers in extreme heat, but where the Super Micro impressed is its ability to cope with a wide range of temperatures, especially when the temperature dipped during early morning or late evening rides. That's down to the mesh trapping a layer of insulating air next to the skin.

The fit is generous, if a little on the loose side. It's a bit longer than most base layers as well, but that does mean a decent overlap with shorts. The sleeveless design is especially handy if you're wearing a very tight fitting jersey over the top, as you don't get the bunching up at the sleeves.


A comfortable base layer that is effective at keeping you dry on hot rides, and copes well with cooler temperatures.

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Make and model: Brynje Super Micro C-shirt

Size tested: M

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?

C-Shirt with no sleeves. Lightweight, super efficient moisture transport capability, insulates and dries better than anything. To maximise capabilities, use in conjunction with another top with a zip to vent, such as a cycling top or another Brynje product.

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

Brynje Super Micro is our summer weight series, the perfect balance between breathability, warmth and the moisture transporting power of synthetic mesh.

The tighter knit of the mesh allows better ventilation for the skin, while allowing air to be trapped against the skin if worn with another garment over it. The mesh is also thinner than it's Super Thermo brother making it extremely light weight and packable. Needless to say it still provides excellent warmth next to the skin.

The Super Micro can be used for a variety of activities, and is proving a popular choice for people who don't quite know what the day will bring! Popular with cyclist worn under the cycling shirt in summer or spring. Runners also can benefit from it's properties since it can be worn as a single layer.

Rate the product for quality of construction:

It's a well made base layer with good durability.

Rate the product for performance:

It's good in hot weather, keeping you nice and dry. Its ability to cope when the temperature drops makes it a good choice for riding into the autumn.

Rate the product for durability:

No complaints so far, it's been through a dozen washes without concern.

Rate the product for weight, if applicable:

It's very light at 90g and feels it on the body, the open mesh design makes it feel very airy over the skin, lacking that clingy feel that some base layers have.

Rate the product for comfort, if applicable:

Found it very comfortable.

Rate the product for value:

It's in the same ballpark pricewise as many other good quality base layers.

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

It copes well with warm weather and hard sweaty riding.

Tell us what you particularly liked about the product

The sleeveless design made it ideal with the current crop of super tight aero jerseys.

Tell us what you particularly disliked about the product

It doesn't feel as soft next to the skin as some other base layers.

Did you enjoy using the product? Yes.

Would you consider buying the product? Yes.

Would you recommend the product to a friend? Yes.

Overall rating: 7/10

About the tester

Age: 31  Height: 180  Weight: 67

I usually ride:   My best bike is:

I've been riding for: 10-20 years  I ride: Every day  I would class myself as: Expert

I regularly do the following types of riding: road racing, time trialling, cyclo cross, commuting, touring, mtb,


David worked on the tech team from 2012-2020. Previously he was editor of and before that staff writer at RCUK. He's a seasoned cyclist of all disciplines, from road to mountain biking, touring to cyclo-cross, he only wishes he had time to ride them all. He's mildly competitive, though he'll never admit it, and is a frequent road racer but is too lazy to do really well. He currently resides in the Cotswolds, and you can now find him over on his own YouTube channel David Arthur - Just Ride Bikes

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