I'd like to replace the roof on my solar (semi hoop) cabana. I
shelter a few plants in it in the winter (and myself too), so I'm not so
concerned about light transmission. The roof gets little light in the
winter, I have a south facing window that gets the most. Mostly I need
tough and flexible as this is curved. I have some cats that like it up
there!

I stumbled on this:

http://www.tarpaflex.com/acatalog/Clear_Poly_Tarps.html

Any comments? Any other ideas?

Jeff