I work night shift. if you do too, you know the frustration of trying to catch a little sleep during the day. I have room-darkening honeycomb curtains, but light sneaks through around the edges. I would often sleep facing away from the window to try to combat this problem, but you can only sleep on one side for so long! I found the Sleepy Time Tracks while desperately searching Amazon after a less-than-perfect daytime nap. I am so impressed with the ease and quality of this product! I would pay TWICE the price for the benefits!! Easy to install, blocks out 98% of the extra light, and sooo worth the price for quality sleep. I wish I had found this years ago!! So grateful for this product!