I just finished constructing a two layer IX under-quilt. The finished dimenstions are 44W X 60L. This one is unique, I think, because I inserted a layer of reflective Mylar between the two differentially cut layers. This works very well for reflecting heat back to the bottom of the hammock. The shock cord adjustment works like a charm for preventing wind and cold drafts from coming through at the ends. It served me well last week during a violent thunder storm in Missouri where winds peaked at 65mph. I'm not sure what the temperature was when the cold front came through, but it was **** chilly outside. No worries at all.