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The room that I intend to convert into a home theater room has two windows. I know that buying black out roller blinds can solve my concern about sunlight brightening up the room when we are trying to watch a movie, but I am not sure how to choose the perfect black out roller blinds for the windows. I used to think that such kind of roller blinds only come in one kind but after visiting stores, I was surprised that they are available in many different fabrics. Choosing the color of the fabric is not difficult as I would only choose the one that goes well with the color and design of the home theater room, but choosing the kind of fabric is not as easy.