yeh, the zpacks is actually a bag, not a quilt. It zips up but it isnt a mummy. I have looked at the WM Antelope MF. That would be ideal but its too heavy. 2lbs 13oz. I could probably get away with the sequoia. its only 2 pounds and 10 degrees. Feeling constricted doesnt bother me. I went with a quilt to keep my weight low