So I was out at home depot today and found some really light plastic backed painters drop cloth. It was white, smooth on the outside and it had a plastic backing. It was around 8 bucks for a pretty good sized sheet of it. I am just not sure how it would sew up....and it was pretty thin, but seemed like it could be good stuff sack material to say the least.

I also found some material in the craft section at Walmart called pro tuff fabric I think. It had a polypropylene style front with a plastic backing as well. It seemed a big on the heavy side to me though.

So, all in all, what readily available materials does everyone use for their packs and what not? Anything that can be easily found at hardware stores or Walmart or anything alike?