Room Darkening grommet top curtains of the highest Room Darkening quality. These grommet top curtains are manufactured with triple weave technology. A triple weave technology is a denser fabric and is tightly sewn together with black yawns to insulate the heat and cold from entering and to achieve its Room Darkening capabilities. The Room Darkening grommet top curtain panel blocks out 70% of the light for a great night's sleep. Perfect for anyone who is a daytime sleeper who works at night and for any afternoon naps. A great addition to a living room, bedroom, child's room, playroom, and workplace. Their thermal Room Darkening grommet top curtains are made of the utmost superior quality to utilize its best features such as room darkening, energy-efficient to save heating and cooling bills, easy to slide and hang, and extra-wide to fully cover your windows.