Big old cheap MOD winter bag/bivy bag and more than comfortable
2 Weeks ago it got to -4 at night acording to watch thermometer :yikes: but i was toasty. A couple of simple things learnt were
1./ choose your tarp point only after lying down in yer sleeping position
2./ mat in inside your bivy bag as every time you move around you have to heat up that patch of floor again so slippage is not good
3./ good wooly hat !
4./ If it gets too cold get yr head inside your bivybag but NOT in your sleeping bag and you will stay warmer without getting the bag wet an cold.
I slept the other week in pretty cold uk conditions (-4ish) but as to how comfortable it was..... .........went to sleep about 10pm max
after a few rums and didnt wake up till 8 lol i cant sleep in that long on a sunday