Contributions by Akos (2)

600ml: Right size to carry as only cup/pot to boil water for tea or dehydro food on a lightweight backpacking trip. Just needs a cap...

Outside temp ~17F very dry weather, water froze inside the tent as well. I was wearing warm base layer pants, wicking layer plus a thin wool pullover and wool socks. Plus a liner in the bag. The bag kept me warm, feet to. Didn't feel any cold spots and was confortable. I'm 6' and bought and the bag is the long one which was quite spatious. The next nights were a bit warmer (still below freezing point) and the bag was toasty. Packs small and really lightweight.

Outside temp ~17F very dry weather, water froze inside the tent as well. I was wearing warm base layer pants, wicking layer plus a thin wool pullover and wool socks. Plus a liner in the bag. The bag kept me warm, feet to. Didn't feel any cold spots and was confortable. I'm 6' and bought and the bag is the long one which was quite spatious. The next nights were a bit warmer (still below freezing point) and the bag was toasty. Packs small and really lightweight.