I'll admit that I'm a bit of a base layer fan. The fabric tech
appeals to my geeky side, and the insulation appeals to my "not
freezing my butt off in the Peak District" side...
Base layer technology has advanced a lot in the past few years.
Gone are the days of simple polypropylene fabrics like the classic
Helly Hansen blue tops. They were great at wicking away sweat, but
also tended to get stinky within hours and were frankly more suited
to hiking or climbing than cycling, where they could actually cause
you to overheat.
Modern tech has brought new fabric ingredients and new ways to
weave them, and the spread of merino wool from niche to mainstream
brings non-itchy insulation that gives an unrivalled balance
between light weight and high performance, and naturally resists