The Bontrager B2 long sleeve baselayer is an ideal choice for those milder rides where you still need a layer next to the skin under your jersey.
This base layer combines Profila Dry 37.5 fabric with merino wool on the back and arms to provide the balance between moisture transfer and keeping the rider warm.
It isn't a thick layer but it does a very good job of keeping your temperature regulated. It has a streamlined fit specifically for cyclists and also features a 8cm drop tail so you don't feel exposed when on your bike. The overall length is enough to enable you to tuck it in, this includes the front.
The sleeves are a decent length, a touch on the long side but they can be pulled up to prevent any bagginess. This all adds to the streamlined appearance. The mix of Profila Dry and merino wool make this quite a thin baselayer but that doesn't detract from its performance. Even in particularly cold temperatures with a jersey and jacket it has provided enough warmth. When the temperature has improved and I've found myself getting a bit warm it has handled the sweat but in warmer climes it can struggle to dispel the moisture quickly enough.
Presumably the merino wool properties also aid the ability to dispel any odour build-up. Wearing the Bontrager B2 long sleeve baselayer for consecutive days hasn't produced any nasty niffs so a thumbs up there.
Available in six sizes from XS through to XXL it is at the more expensive end of the spectrum. You'd have to part with the best part of fifty pounds for this baselayer. For a non-winter specific item this may appear steep, but it works very effectively.
Lightweight baselayer that performs well
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road.cc test report
Make and model: Bontrager B2 Long Sleeve Baselayer
Size tested: Large - Black
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?
The Bontrager B2 long sleeve baselayer is a lightweight layer worn next to the skin. It performs well, keeping the heat in but dealing with the moisture needing to go the other way. It prevents odours and overall is worth spending that little bit more.
Tell us some more about the technical aspects of the product?
Bontrager have achieved this blend by using the trademarked Profila Dry 37.5 technology. You might question what technology would feature in an item of clothing but as athletes demand better performances from their equipment, brands have to step up in their quest to provide it. Bontrager have used the 37.5 technology and combined this with merino wool on the back and arms of the B2 long sleeve baselayer to provide the balance between moisture transfer and keeping the rider warm despite this dampness.
It isn't a thick layer and only weighs 50g but it does a very good job of keeping your temperature regulated. It has a streamlined fit specifically for cyclists and also features a 8cm drop tail so you don't feel exposed when sat on your bike. The overall length is enough to enable you to tuck it in, this includes the front.
Despite the thinness of the material it has proven to be robust and more than tough enough to deal with every day use.
It does everything you would expect in terms of retaining the heat and even when you up the work level it dispels moisture effectively, only struggling when you get particularly warm.
It has proven to be robust enough for regular use.
The Bontrager B2 long sleeve base layer is on the lightweight side so you won't feel burdened by the weight.
The material feels comfortable next to the skin and you won't be irritated by the seams.
Despite the cost, you are getting a good value item of clothing. Designed for use in cold or milder conditions it performs well.
Tell us how the product performed overall when used for its designed purpose
I was impressed, given the lightweight feel I was sceptical at how the Bontrager B2 base long sleeve base layer would perform and indeed how durable it would be. It has however dispelled these doubts within a few wears.
Tell us what you particularly liked about the product
The lightweight feel and effectiveness.
Tell us what you particularly disliked about the product
Would be nice to get a choice of colours.
Did you enjoy using the product? Yes
Would you consider buying the product? Yes
Would you recommend the product to a friend? Definitely
Anything further to say about the product in conclusion?
Lightweight and comfortable yet durable base layer.
About the tester
Age: 45 Height: 178cm Weight: 80kg
I usually ride: Currently riding a Pinnacle Evaporite Three My best bike is: As above
I've been riding for: Under 5 years I ride: Every day I would class myself as: Experienced
I regularly do the following types of riding: road racing, commuting, sportives, mtb, Not yet but looking to dip my toe in the world of TT