Blobfish: The jumpsuits we made were almost all for guys, and they didn't want them to be too tight or form-fitted, so we didn't need the stretch denim. We used a medium weight denim, and they do tend to get pretty hot. In 2010 I dressed as Moira from FO3 in a light-blue Robco jumpuit. It was hot and uncomfortable and nobody had a clue who I was. Last year I made a "fem" cropped-top for myself (with yellow striping and front zipper) that I wore with jeans at D*con, because I wanted to be in pics with our whole group but knew I would never wear the full Vaultsuit long enough to bother making one. If I had made one for myself and wanted it more form-fitted, I would probably have used stretch denim. I really need to find a pic of one the guys in a Vaultsuit and post it, but not likely to happen until after D*con.