The CineGrey 5D is an angular reflective front projection material designed to reject ambient light while maintaining superb picture quality. The CineGrey 5D is the perfect solution for rooms that have little or no control over incidental light. This means that it's an ideal fit for family rooms as well as lecture halls, boardrooms, sports bars, training facilities, and other business environments. In addition, the CineGrey 5D increases projector brightness 1.5 times. This is perfect for low lumens ouput projectors! The CineGrey 5D is superior to traditional white or gray materials in its ability to maintain a sharp, bright image regardless of ambient light. The angular reflective material incorporates a diffusion layer over a highl reflective surface. This causes direct light from the projector to reflect squarely into the viewer's field of vision while the outer contrast layer enhances image quality while absorbing indirect ambient light.