Extreme Blackout technology blocks out 100% of outside lightEnergy Efficient design reduces energy lost through your windows by up to 50%Thermal properties help keep summer heat and winter chill out of your homeNoise reduction by up to 45% helps you get a sounder, more uninterrupted sleepGrommet top design allows for easy slide-through installation on curtain rods up to 1.5" in diameterSun Zero Oslo Curtain Panels provide the ultimate in light blocking technology to keep out even the harshest of light while bringing an elegant urban sophistication to any room of your home. Sun Zero Extreme Blackout technology is laboratory tested to block out 100% of light, reduce outside noise by up to 45%, and decrease energy lost through your windows by up to 50%. Comfort is optimized with thermal properties that help keep summer heat and winter chill out of your home. Built-in metal grommets allow for easy slide-through installation on curtain rods up to 1.5" in diameter. Hang in your entertainment room to eliminate screen glare and reduce distracting outside noise, or in your bedroom for enhanced privacy and a sounder, more uninterrupted sleep.