Sun Zero Riley Curtain Panels add a bright, fun pop of color to a kid's bedroom, playroom, or any room of your home. Equipped with built-in metal grommets for easy hanging on standard curtain rods up to 1.5" in diameter. Sun Zero Blackout technology blocks out most outside light, offers outside noise reduction by up to 30%, and decreases energy lost through your windows by up to 40%. Comfort is optimized with thermal properties that help keep summer heat and winter chill out of the room.