Unless you are into your sports, you could be forgiven for thinking a base layer is only there to keep you warm. But any serious cyclist will know that a decent base layer is there to regulate your temperature whether you are performing in the heat of August or bitter colds of February.

The Rapha Base Layer is made from 100% merino wool, which is a supple, soft and light fabric that only weights 150g. It feels wonderful against your skin and performed admirably in our tests. Many brands of sports clothing claim to wick away moisture to keep you dry, only to fail to keep those sweat patches at bay, but the Rapha Merino Base Layer genuinely works hard and keeps you comfortable throughout.

The other great thing about the Merino material is that it is naturally anti-bacterial and odour resistant; there is nothing worse than smashing your personal best and then stinking out your mates whilst you brag about your results.

We tested out the Short Sleeve Navy Base Layer, which also cones in eight other colours as well as coming in long sleeved and sleeveless. All the seams use flatlock stitching so they won't rub or irritate the skin, and are cunningly positioned behind the shoulders to avoid bag or bib straps rubbing. The base layers are close fitting and cut long at the back so there is no creeping up your back and exposing skin whilst you are out on the bike.

In summary, the Merino Short Sleeve Base Layer is a high performing base layer that will look after you throughout the year. RRP £60

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4.8 out of 5

Pros

Merino wool

Wicking keeps you dry

Regulates temperature well

Long cut

Flatlock stitching

Seams positioned behind shoulders

Available in long, short and sleeveless