It's made from Isolfil Merkalon polypropylene and the yarn is made up of loosely twisted smaller strands, so there's a large surface area to draw sweat away from your skin and shift it outwards, which it does very effectively. Although polypropylene moves moisture, it doesn't absorb it, so this base layer dries out really fast.
If you get a close fit – and that's not difficult because the Super Thermo C-Shirt is very stretchy – the mesh structure will trap a layer of air around your body for insulation. Being sleeveless, it doesn't provide masses of warmth, but I found it about right for cooler summer rides (or spring and autumn) when the temperature is in the high teens (°C). Brynje also have a Micro C-Shirt in a thinner weave that's suitable for warmer temperatures.
Start to overheat and opening the zip on your jersey gets rid of that insulating air immediately – quicker than with a solid-knit base layer – and dries off sweat faster.
All the seams are flat so you can't feel them in use, and although this isn't a cycle-specific cut I didn't have any problems with gaps around the lower back.
Also available in black and in T-shirt (£32), long sleeve (£39) and zipped (£49) options, and in various styles with wind-resistant panels.
Lightweight polypropylene base layer that shifts moisture well and dries out very fast.
road.cc test report
Make and model: Brynje Super Thermo C-shirt
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?
Brynje say, "A favourite among cyclist and summer hikers. 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.
Use: All sports from cycling, skiing to fishing, but truly excels in high intensity activities."
Tell us some more about the technical aspects of the product?
Polypropylene doesn't absorb moisture, it just moves it, so this base layer doesn't get heavy with sweat and it dries super-quick.
Rate the product for quality of construction:
7/10
The construction is good, although there's not a great deal to get right or wrong here.
Rate the product for performance:
8/10
I really rate polypropylene as a base layer fabric because it doesn't absorb moisture. Occasionally, it can feel a bit scratchy, but not here.
Rate the product for durability:
7/10
Rate the product for comfort, if applicable:
8/10
Rate the product for value:
7/10
Tell us what you particularly liked about the product
The fabric works really well.
Tell us what you particularly disliked about the product
Not a lot. A string vest – sorry, 'a mesh base layer' – doesn't win any prizes for looking cool, but you can't argue with the performance.
Did you enjoy using the product? Yes.
Would you consider buying the product? Yes.
Would you recommend the product to a friend? Yes.
Age: 41 Height: 190cm Weight: 75kg
I usually ride: My best bike is:
I've been riding for: Over 20 years I ride: Most days I would class myself as: Expert
I regularly do the following types of riding: time trialling, commuting, club rides, sportives, general fitness riding,
It is in the article... "Orro has introduced many excellent bikes since it was launched in Sussex back in 2014."...
Yes, and plenty of people 'drive as correctly' as him on the roads round here, tbh I always expected this outcome, simply because of my experiences...
In terms of the specific substance possibly, but even driving in the car I am regularly following the driver in front and making decisions to drop...
The bus should have been bigger and brighter coloured. How are drivers expected to spot a bright yellow double decker bus on our roads?...
It touches every area of life, I had to miss the wedding of one of my best friends in Washington DC because the (relatively serious but not...
BBC news article on this implies anyone cycling on the road, rather than using the cycle area, is riding incorrectly! ...
new standard for car park layout just dropped
One thing that definitely doesn't hold up emergency vehicles is the volume of car traffic on the road or the autobesity of cars that has been going...
There is a modest scientific literature on cycling shoes. It is generally sceptical about the value of greater stiffness provided by say carbon...
This story on its own says that's not true ....