These curtains are amazing quality for the price. They aren't 100% blackout, but pretty close. They are thick enough that I don't need another layer behind for darkness or warmth. But if you wanted to add another layer with a double curtain rod, than you will achieve a completely pitch black room.
I restored a house over 100 years old, but couldn't replace the windows. These curtains helped in both winter and summer to help regulate the temperatures. Attractive and practical. Highly recommend.
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