Wow! Ok I was totally skeptical when i ordered this. We rent and the doors in the hours are crap and super thin. I got these and put them on the inside (back of the door) of my 2 year olds room. It was horrible everything would wake him up. So I got these. I ordered the 12 pack because I wasn’t sure how many i needed. Should’ve gotten a bigger pack. 12 doesn’t cover the entire door. Needed three more. Even with the three missing at the top these work so well!!! I was so skeptical when I got them because they are super light and seem really thin. But I put them up anyway I figured it’s better than nothing. I am so shocked how much they actually block out even with a few missing !!! I highly recommend them!!!