Headliner Insulation..???

I dynamated my 70's roof, and then put the double foil sided insulating blanket ( available at Speedway Motors or Aircraft Spruce) on top of that using that aluminum, wax paper backed foil duct tape along the edges and any seams to hold it up there.I have a black perforated headliner, and the foil doesn't really show through the perforations.

This the stuff you use over the dynamat? I've never seen it before but it makes sense.
https://www.amazon.com/dp/B075NPTXSG/?tag=fabo03-20
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