Experience the ultimate in light blocking technology with Sun Zero's Cyrus Thermal Total Blackout Grommet Curtain Panel. This single panel is designed to keep out even the harshest of light while adding energy efficiency to any room of your home. With Sun Zero's Total Blackout technology, this panel is laboratory tested to block out 100% of outside light, reduce noise by up to 35%, and decrease energy lost through your windows by up to 35%. Additionally, thermal insulation helps keep summer heat and winter chill out of your home, optimizing comfort. The built-in metal grommets fit curtain rods up to 1.5" in diameter, making for easy installation. Perfect for entertainment rooms, bedrooms, or any room in need of light control and privacy.