On these cold winter evenings, your helmet may not offer the best form of insulation against the frigid air, especially when barrelling downhill at 40kmph.

Step in New Zealand manufacturer Icebreaker with their merino wool skull caps. It offers excellent warmth and breath-ability thanks to the remarkable natural fabric.

We are big fans of Merino wool and have reviewed jerseys and tops before.  This lightweight beanie covers your ears and is virtually seam free for a comfy fit.  Its slim design means no lumps or bumps in your helmet and if you do get to warm to scrunches up small in your jersey pocket.  It also crosses the boundary by being not just bike specific and can be easily worn off the bike too.

RRP: €22