100% Polyester Blackout technology blocks out most unwanted light while enhancing privacy. Double rod may be needed for layering Energy efficient design reduces energy lost through your windows by up to 40% Thermal properties help keep summer heat and winter chill out of your home Noise reduction up to 30% helps you get a sounder, more uninterrupted sleep Built-in metal grommets fit curtain rods up to 1. 5" in diameter Each panel sold separately. (Image features 2 panels) Panels sold individually. Measure carefully prior to purchase. (Image features 2 panels) Performance varies by product color; darker the base color the more light blocked Note: Depending on the brightness on the computer, color may look slightly different