On the weekend camping trip, I brought along my sleeping bag made of lost mittens. I even fashioned an appropriate carrying sack made from vinyl and canvas. I trusted the collective warmth of lost mittens so much, I didn't even bring a spare sleeping bag.
I didn't sleep outside the tent at night, but this is me just taking a little nap in the afternoon.
(Un)Scientific Evidence: Indicates that loss mittens kept me warm all night. The temperature rating on this sleeping bag would be about 15 degrees, so its no 4 season sleeping bag. But definitely warmer than nothing, and definitely cozy. It is also not the lightest or most compact sleeping bag available. In fact, it is a bit combersome. But it sure was a interesting experiment. It was a bit weird to think about all the people that had lost a mitten or glove and now that mitten or glove has taken on another life in this sleeping bag. I am currently working on a second bag and have plans for a series of 5.