Roc-lon Budget 3-Pass Standard Blackout Light Control Lining, 54-Inch, White/White, 25 yards per roll 100-Percent Blackout Insulation, helps keep rooms cooler in the summer and warmer in the winter Ultra-violet resistant helps prevent sun-fading of decorative fabrics, carpeting and furniture A built-in sound barrier helps reduce out-of-room noises at the window