Originally Posted by
BillyBob58
Sounds like a good idea. A little extra weight for the extra shell material, but it should greatly decrease any sew thru heat loss and you end up with 2 quilts. Cool.
But again, really, how much dif does it really make if you sew thru? I guess the manufacturers know, but not a lot if you go buy the specs at WM. And again, I'm guessing that most of the benefit is in real world use ( rather than a lab rating) where controlling the down's movement as you thrash around in your sleep, might end up being more important than the loss of loft on the seam line. But I'm just guessing.
Speaking of seam lines, you would think I would freeze in the PeaPod top wise. There is no draft tube over the top Velcro closure. And you can clearly see that there is about a 1/4" space above you, the whole length of the bag, with little or no down. Nothing but nylon and Velcro is over you. None the less, if you close it down from, say, a 6" opening to a 2" opening, you can tell a large dif. And if you close it down all the way, you can tell ( quickly) an even larger dif. Even though you would think a lot of body heat would still be escaping along that wide seam line, which is huge compared to any sewn thru bag. I was afraid that would be a major draw back top wise, i had even thought about DIYing my own draft tube. But I can't say it has been much of a drawback that I can tell. Not enough to bother with.