Uniglo are selling 100% merino half zipped tops for £19.99. I got a couple and I'd say they're much, much better than the craghoppers ones I normally use. Good length on both body and sleeves (even for me and I'm 6'5") and a good fit.
Well recommended for anyone who's after a wool baselayer.
Well recommended for anyone who's after a wool baselayer.