Sorry, caught using a southernism . I was meaning the material, or stuff, in the bag. Its apprx. 1" thick sheets. I was going to use both the "top" and "bottom" of the bag's material (I'm a REALLY COLD sleeper).
Also, if you look at JustJeff's page where he talks about the winter hammock, he has a pic where he is laying in it and you can see the stitching running beside his shoulder.
What I think I'll try is to cut it just smaller than the width of the hammock while its laid flat on the ground. Then tapper the material at the ends.