Blackout technology blocks out most unwanted light while enhancing privacy|Energy efficient design reduces energy lost through your windows by up to 25 percent|Thermal properties help keep summer heat and winter chill out of your home|Noise reduction up to 25 percent helps you get a sounder| more uninterrupted sleep|Built-in metal grommets fit curtain rods up to 1.5 in diameter|Panels sold individually. Measure carefully prior to purchase. (Image features 2 panels)