Isn't this a good idea. I had thought (notice I said thought) about this a while back but never did anything about it. I'm glad someone did.
This is the front
This is the back
These are made like roman shades and being quilted they provide more insulation than a regular curtain.
I have thought about hanging one of my show quilts in front of my bedroom window but it wasn't big enough so I just put the idea on hold for awhile. At least if I did that I could show off my quilts around my cracker box of a house.