Too crinkly and they shred. I will use space blankets for the underside of my hammock to block wind. The reflective nature is overrated.
Tyvek....any Tyvek works well for me. Homewrap, kite tyvek, anything you can get your hands on works.
A sheet of silnylon also works well and I think that's what's in my pack now, for tarping.
Coated ripstop works fine too but is a tad heavier than the above choices.