These paisley blackout grommet top curtains are manufactured as a 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 blackout capabilities. The blackout grommet top curtain panel blocks out 85% of light for a great night sleep. Perfect for anyone who is a daytime sleepers who works at night and for any afternoon naps. A great add to a living room, bedroom, childs room, playroom and workplace.