[Blackout technology blocks out most unwanted light while enhancing privacy Energy efficient design reduces energy lost through your windows by up to 25% Thermal properties help keep summer heat and winter chill out of your home Noise reduction up to 25% helps you get a sounder more uninterrupted sleep Tab top design allows for easy hanging on curtain rods up to 1. 5" in diameter Panels sold individually. Measure carefully prior to purchase. (Image features 2 panels)]