I was warm!!!
Last night two of my Earthwatch buddies and I were the first to try out our newly built igloo. I was soooooo nervous about being cold, so I brought a few things to add heat to my sleeping bag... a water bottle filled with hot water and a freshly baked potato. I know, it sounds crazy, but did I mention that I was nervous? I also got to sleep in the middle because I was the shortest and that is where the igloo entrance was located. I didn't mind because it meant maximum body heat and minimum chances of snuggling up with a block of ice. To enter the igloo, there was a tunnel dug underground so you had to crawl under and up to get inside. That also allowed a low spot in the igloo for cold air to sink into. We lined the bottom of the igloo with caribou hides for insulation and a vent hole in the "ceiling" provided for ventilation. It was surprisingly warm inside, once I crawled into my -40 rated sleeping bag. (That rating is for survival, not comfort!) But I was quite comfortable. My spud was pretty useless, but the water bottle provided warmth the entire night. I had the mummy sack cinched tight around my face and my hat pulled down over my nose. At one point in the night I reached up to touch my nose because I could no longer feel it. That is when I pulled my hat down over it. In the morning, there was a ring of ice around the opening of my bag from my breath freezing! I am quite tired today, so even though I slept alot, it must have taken alot of energy for my body to stay warm.