I bought these after my first set of curtains were not actually blackout curtains.  These are!!!! The sun shines super bright in my room at sunrise and these curtains barely shine any light through.  And they are beautiful and satin looking. I get compliments on them.  The pictures attached show some light coming through, but I took these pictures when there is peak sunlight outside to prove that during the brightest light, with lots of snow on the ground, these keep so much of that light out.