I am so grateful for Sleepy Time Tracks. They were so easy to install and they are very effective. I had spent a lot of money hiring a major window covering company to make a custom blackout solution for me, but so much light still leaked through the sides of the blind and curtains. I was really disappointed, but Sleepy Time Tracks solved the light leak. My baby sleeps so well in her dark room! I love that they’re removable, they were shipped to me in Canada very quickly, and very reasonably priced.