100% Polyester Elegant faux dupioni silk fabric with a raw slub texture imparts opulent radiance Extreme Blackout Thermal Lining blocks out 100% of outside light 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 by up to 30% helps you get a sounder, more uninterrupted sleep Back tabs fit curtain rods up to 1.5" in diameter