This garbage isn't worth a dime. The tape used to secure the file barely sticks to anything and pulls off with almost no effort. The file tears no matter how careful you are with it. I had to put it up twice just to get to the point where the blow drying of the wrinkles caused the film to shrink just enough to pull large chuck of tape off the window sill.This stuff is garbage. It isn't worth the money or the frustration that is involved in getting it attached. You might as well take the money you would pay for this and burn it to keep warm as it is just as affective.I will never buy this again.