Besides weight savings, are there any other advantages of using a quilt rather than a sleeping bag?
I was perusing Nunatak's web site, checking out some of their offerings. I came across a sleeping bag and its quilt counterpart:
Alpinist (sleeping bag): http://www.nunatakusa.com/site07/other_bags/alpinist.htm
Arc Alpinist (quilt): http://www.nunatakusa.com/site07/arc_products/arc_alpinist.htm
All things being equal (size, temperature rating, etc.), there does not seem to be that much of a weight savings benefit (for quilts). For example, a medium-size 20 deg F bag using Nextec weighs in 25 oz, whereas its quilt counterpart weighs in 23 oz (note: the bag is slightly taller and wider than the quilt).
I'm sure the quilters here aren't doing it for just the weight savings alone (or are you?). So, I was wondering are there other qualities of quilts that led you choose them over sleeping bags.
I am aware of the "the down you're laying on is compressed, thus not providing any insulation value" argument. So, I was wondering if there are other arguments for quilts (weather conditions, sleeping style, type of shelter--bivy only, bivy + tarp, tarp only, tent, etc.).
I writhe around in my sleep a bit (alternating between back-leftside-rightside--never stomach), so I am wondering if that should be a consideration.
Also, if there are arguments for choosing a sleeping bag over a quilt, I would be interested in hearing those as well.