Is polyester insulation better than fiberglass insulation?

depends on your definition of "as good" if you mean does it insulate as well as fiberglass the answer would be that styrofoam board insulates much better and that it will dramatically reduce your...

copper

Cotton absorbs water (sweat) better than polyester, therefore causing an odor (smell of sweat) to be given off when worn (if you sweat, that is).

Depends on intended usage and preferences. polyester dries faster but is less resistant to heat.

Some vermiculite insulation may contain asbestos. From the 1920s to 1990, a vermiculite ore produced by the Libby Mine may have contained asbestos. It was sold in Canada as Zonolite Attic Insulation...