the foam backed fabric works the best in my experience. It’s very forgiving and very wrinkle resistant.
You can buy this stuff for $15/yd at chroma-key.com or filmtools.com as well. It only comes in 5 ft width, although you can get it almost any length. Note that the 10 ft screen they’re selling has a seam in it. Even with the seam, I’d still recommend this. It’s very nice stuff.
The material itself is made by Velcro. If you want to buy an entire 40 yd roll of the stuff you can get it for $5/yd from them directly.
cheers,
Jim
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Jim Tierney
Digital Anarchy
http://www.digitalanarchy.com
415-586-8434