Agreed, I went out for a couple of days this time last year and froze my bum off. I was in a bag that was rated to about 10C but I sleep really hot so I thought it would be OK. Good job I had the Berghaus jacket and wooly hat on during the night, I think I actually woke up once warm!
It was so cold in the morning I got this roaring Beech fire going to thaw out and was sniffing and thinking to myself, huh, there must be some wood with resin or some kind of laytex in it as I could smell burning rubber. It was only when I looked down and saw my boots almost of fire that I realised how close I was to the fire.
Take a Snugpak rating with a pinch of salt is my advice.
This pic just screams
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BREW TIME!