"LIGHT BLOCKING The curtains, benefiting from the innovative triple weave technology, block out 85-99% of sunlight and UV rays (dark color works well) for maximum privacy and undisturbed sleep. Material:DONREN curtains are made of high quality polyester blackout fabric, which is soft and smooth to the touch. MATCH VALANCE & TIP CURTAINS In DONREN store, there are valances and tier curtains in the same colors (12""/15""/18""/24""/30""/36"" length), match the blackout curtains. CARE INSTRUCTIONS - High quality workmanship, can withstand years of use. Machine wash in cold water. Use only non-chlorine bleach and warm iron if needed."