These thermal window curtain blackout grommet panels 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 chevron thermal blackout grommet curtain panels blocks out 99 percent 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, child's room, playroom and workplace.You will receive a set of 2 blackout curtain panels.Each panel measures 130cm inch wide x 210cm inch long.100% Polyester.