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This screen is made out of a stretchy polyester material with a nice white front and a second layer of black fabric in back. The light-blocking of the black fabric isn't 100%. This will do a good job of blocking dim light behind, but it may not fully block light if put up in front of a window.
For a permanent installation, it feels like it could be stretched nicely into place, but I'm not sure if it will still maintain the exact dimensions once stretched. I'm using it as a temporary screen both indoors and outdoors, and for that it is pretty ideal. It folds up easily into a small bag--when folded it takes up about as much space as a folded bed sheet. With the included hooks, it hangs up really easily and can be stretched enough to make most wrinkles unnoticeable.
Mine came with some rope and some hooks to use in the wall, and both do their job well.
There are some wrinkles from it being folded, but they are not distracting when watching. Since it is fabric, it is probably possible to wash it and/or iron it to get out all wrinkles, but since I put it up for a few hours and then put it back in the included bag, I haven't tried.
The edge is nicely reinforced, and the grommets that are included feel like they are pretty solid.
I paid about thirty-five dollars and for that price, this is an excellent and versatile screen.