"Independently U.S. laboratory testing certifies this curtain is 99.8% efficient in blocking out light! The perfect sidekick for movie marathons and lazy Sunday sleep-ins, room-darkening curtains keep entertainment areas almost as dark as the theaters. This heavyweight curtain panel features a superior, triple-weave fabric construction that blocks out light and stops heat and cold from penetrating through the density of its construction, which invisibly integrates black yarn into the pattern of colored yarns. This 56” wide curtain panel is soft to the touch and compliments any room decor. These panels are available in 63”, 72”, 84”, and 96” lengths. Each curtain panel has 8 grommets (1.25” inside diameter). It also features 1\