Symphony Matinee Cellular Shades are a 100% polyester non-woven fabric, which is infused with metal “flex” to virtually eliminate all eliminate light transmission. Unlike other “black-out” window shades, Matinee is designed to provide a darkened room atmosphere, perfect for sleeping, but still provides a small level of illumination for fashion elegance. Matinee shades block out 99% of visible light (through the fabric). The remaining light transmission provides a luminescent glow.