[masraum]

Foam board is fine, it's just a lot more expensive, I think.

Several years ago, I was able to get Johns Manville "encapsulated" insulation at Lowes. It's fiberglass, but has a thin plastic barrier all of the way around (except the ends). It was much, MUCH better to work with. I insulated our old attic with it and never had any of the usual fiberglass problems.

I'm not sure if you'll find it now or not due to the supply chain issues that the entire world seems to be having. (I wonder if China has a surplus of a bunch of crap or if they're having issues too).