100 Percent Blackout:Sewn with blackout coated lining,room darkening curtains can block out sunlight,uv rays effectively and provide thermal insulation,noise reduction and total privacy protection,which is a perfect choice for night shifter and people who are sensitive to the light.
54 Inch Black Out Curtains for Bedroom 2 Panels Set, Cream
These blackout curtains use advanced blackout coating technology, which can basically achieve 100% blackout effect. When it is hot, it can help you isolate the heat from the outside to a certain extent.