Originally Posted by Kevin_T
I think taking a sleep number for car camping would rock smile

Yes, sharing a quilt can save a lot of weight, you only need about 25 % more material, and you get a higher warmth rating as well, since two bodies are creating heat, theoretically, insulation can be cut in half, but in reality, it's probably more like a 40 % reduction. So for instance, the same amount of insulation that a single person requires for 30 degrees, should get two people to 15 - 30 degrees below zero, assuming the same amount of space.



Ray Jardine and his wife have been doing that for a couple decades at least. He sells a 2-person synthetic quilt kit. Jacks R'Better sells a down one. Quilts only work well for normal people down to freezing or a little below, unless you incorporate something that approximates the insulation of a sleeping bag hood into a vest or jacket. The JRB down hood velcroed onto a down vest is what many use. I think that was Francis Tapon's system on his CDT yo-yo.