With the same optical characteristics as the High Contrast Da-Mat material, this surface is designed to provide the viewer with a more realistic soundstage by placing speakers behind the screen and allowing the sound to be transmitted through the material. This screen surface is best used when there is good control of ambient lighting and a moderately wide viewing angle is desired. Screen surface can be cleaned with mild soap and water. Flame retardant and mildew resistant. Viewing Angle: 45° Gain: 0.8.