If getting more sleep was one of your New Years resolutions, I hear you. We bought blackout liners for the girls room about five months ago because we needed a solution for the bright light that kept interrupting the girls sleep (in other words-ours).  Since we had linen curtains from our Indiana house, I wanted to see if I could make them work by just adding a liner. After reading all the mixed reviews, we bought these liners and have not looked back. The room gets exceptionally dark and I am happy that I get to continue using our linen curtains.

Here you get an idea of how opaque these things are.

~