Buff Windproof Helmet Liner
Very warm, windproof helmet liner. Unlike in the picture, ours are dark blue.
It is a truth universally acknowledged that *at least* 217% of body heat is left through the head...
Well, not really. But a warm head is a big part of comfort and safety; cold often makes for bad judgement, not a good thing in a cave - or navigating off the Allotment in winter, for that matter.
A low volume hat that is made to fit neatly under a helmet without getting in the way, and also small enough to stow neatly when the going gets hotter. It will keep your ears warm - it is sized to cover these completely; it is *very* comfortable in the cold, doesn't ruck, or get in the way. Good for digs, camping, or just chilly caves in general.