Originally Posted by bikemig

I'd take a good long hard look at a quilt rather than a sleeping bag. Enlightened Equipment mentioned above makes one. The neat thing about EE stuff is that it is cut to fit you.

Most of their stuff is down but not this, Revelation APEX | Lightweight Synthetic Quilt

The site has some reading on quilts versus bags.

I used a quilt on a trip last summer and loved it.