In the background is relatively thin material. After ironing, I have not really got it rolled smoothly (on 50mm pipe). Against wrinkles there are pinch "Photoshop" ;-)) The material is not really light-tight, it is for my purposes but absolutely useful, because I have a basement, which is barely lit by daylight (wg. Transparency). For this price I had no professional quality expected and am satisfied with the result in this price range.