In fairness, the industrial standard sleeping bags are perfectly adequate in terms of keeping you warm. However, being an awkward sort of person, I had some difficulty in actually getting in my bag and during the few minutes it took me, I thought I might expire with the kind of polar exhaustion suffered by Scott and Oates etc. Worse was to come since I had to get up twice for a piss in the night, which wasn't fun, especially as, on the second occasion, I'd undone my sleeping bag zip to the point that it had disengaged with the catch. In a tense few minutes, I was again reminded of Scott and his death as my shivering fingers fumbled to put my sleeping bag back together. I did it eventually and then managed to finally fall asleep at 7:30, about three minutes before we were woken by someone bringing in hot lingon juice (a local delicacy). That was also our cue to get up and hit the hot showers, which was a kind of welcome respite. This is the kind of thing you do once and once only, unless you are bonkers, or Ranulph Fiennes or on some kind of kamikaze mission.