Sun Zero Cyrus Curtain Panels provide the ultimate in light blocking technology to keep out even the harshest of light while adding energy efficiency 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. Sold as individual panels measuring 40 width by 84 length. Measure carefully before selecting your desired size and quantity. Machine wash cold on gentle cycle. Use non-chlorine bleach when needed. Tumble dry on low heat， using a cool iron as needed.