Fabric specifications: Sapphire's matt white fabric is composed of triple ply fibreglass laminate which helps prevent wrinkles and waves. The screen fabric consists of a special material that helps prevent the loss of light, making it compatible with non short throw projectors. Our screen fabrics are designed to be fire, water, and mould resistant and can be cleaned if necessary. The top layer of the fabric has microdots that are made with PVC technology that helps create the best possible reflection. The 1.1 gain reflects the same amount of light back that the projector produces achieving a true cinema experience. The back of the fabric is completely black enabling you to put this in front of a window.