Our blockout fabric is constructed with three layers and is 100% polyester. The middle layer is used to significantly enhance the brilliance and vividness of the colors and to ensure that no back lighting will spoil your image. Perfect for applications to stop flash and glare such as for photo backdrops and is mostly used for indoor uses. This fabric banner will definitely set you apart from the others. We have had great success with this blockout fabric banner material and so will you!