perfect for their purpose.  I love them!  heavy and thick enough to block out the sun and not move around a bunch.  I used 3 panels on a, little wider than standard width, sliding glass door.  I have a pool in the back and a lot of sunlight all day, so it went from an extremely bright room to a cool, dark, and cozy room.  I want to be in this room all the time now, pretty much because of the curtains.