I have to say if I had to do it all over again I would use only thinsulate, I have no affiliation with Hein or his company but they deliver fast and the product is super easy to work with, yes it's a little on the pricey side but well worth it
He can answer any questions you have about it with no pressure sales tactics
I second the Thinsulate. In the scheme of the whole project, the cost is a blip.
Primaloft is good stuff as a fabric--makes excellent quilts, etc., and is hydrophobic. It's not got the heavy scrim nor body that Hein's automotive Thinsulate has, though, so I suspect it would be more vulnerable to shifting out of place. In quilts, it needs closely spaced stitching.