Custom Blackout EZ Window Cover (vinyl)
[Custom Vinyl]

Awesome product. My bedroom is dark - like a cave. This solution is far less expensive and actually more efficient than the big store solutions (I know b/c I got an estimate for their product, which only blocked up to ~ 85% of the light). These things work. Solid customer service, too. And you may be able to find other uses for any leftover material. Strongly recommend. I ordered the large size (not custom).