I bought these liners to go under curtains on french doors that lead to a screen porch. In the winter the doors leak cold air. In prior years I put up plastic winterizing covering over the doors  - but I hated the way it looked. I am trying curtains over the doors to see if that keeps the cold out and looks better. So far - so good!

Pros: great value, white facing outside, easy to hang
Cons: I'd prefer a white on both sides...but I understand it is a "blackout liner"