"Blackout technology blocks out most unwanted light while enhancing privacy 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 Reduces outside noise by up to 30%. They will help you get a sounder, better, more uninterrupted sleep.Use non-chlorine bleach when needed 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"