Total Blackout technology blocks out 100% of outside light while enhancing privacy Thermal insulation helps keep summer heat and winter chill out of your home Energy efficient design reduces energy lost through your windows by up to 35% Noise reduction up to 35% helps you get a sounder, more uninterrupted sleep Built-in metal grommets fit curtain rods up to 1.5" in diameter Sun Zero Cameron Thermal Insulateds provide the ultimate in light blocking technology to keep out even the harshest of light while bringing a subtle texture to any room of your home. Sun Zero Total Blackout technology is laboratory tested to block out 100% of light, reduce outside noise by up to 35%, and decrease energy lost through your windows by up to 35%. Comfort is optimized with thermal insulation that helps keep summer heat and winter chill out of your home. Equipped with built-in metal grommets for easy hanging on standard 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.