Why we chose it: Very comfortable, excellent warmth-to-weight, good eco-aspects

If you’re looking for a baselayer that’s going to do the job for you when the temperature really plummets, this is definitely one we’d recommend turning to. At 210g, it’s impressively light too.

Then there are the eco credentials. Not only is this made from 88% recycled nylon, but it comes with permanent Polygiene anti-odour treatment. Now, the idea behind Polygiene is that it prevents the build up of odour causing bacteria, and that, in principle, means you don’t have to wash any kit that has the tech embedded within it. We’ve used a lot of kit with Polygiene and we know it works, in fact you can check out OM editor Will singing its praises over on our Youtube Channel after he conducted a test where he ran in a pair of Polygiene socks for 10 consecutive days without washing them.

When you consider the fact that up to 3.3kg of carbon emissions can come from a single wash and dry cycle, anything that helps to reduce the need to wash our kit gets our vote, especially running kit, which can all too often require washing after every single use.

On top of all that, by preventing bacteria from spreading, Polygiene can even prevent fabric fibres from degrading, ultimately making garments last longer – another big positive aspect when it comes to sustainability then.

Tester’s Verdict

Will Renwick, editor of Outdoors Magic

“This is a quality baselayer – in fact, it might be one of the best I’ve tried. It really is incredibly comfortable against the skin and the warmth to weight ratio is hugely impressive.”