This bestselling blackout drapery muffles sound and helps reduce out-of-room noises at the window. Perfect for homes, nurseries, schools, and workplaces, this drapery lining insulates and helps keep rooms cooler in the summer and warmer in the winter. This 3-pass lining allows you to use the lining as a standalone drapery if desired because it features a layer of white foam, black foam, then a third and final layer of white foam to achieve 100% blackout with both sides of the lining remaining white in color.