oh my there are so many wonderful lofty batts on the market---time to step outside that box you put yourself in and try out some others.
read the packaging- it will tell you the loft--anywhere between 1/8" and 1"...and all measurements in between (w&n is 1/4")
wool is a bit spendy===but definitly worth it for the really great quilts!
there are some very nice high loft poly's on the market, bamboo and dream green are both nice to work with and give a lightweight lofty soft quilt...i like the bamboo (almost) as much as wool---almost.