This is just genius!! It's like a screen door! It's a little tricky to install, you have to make sure you line it all up right and get the Velcro around the door positioned right. It comes with a strip of Velcro to go around your door as well as push pin nails to secure it all. The middle slot has magnets to draw it back together and easier to open as well. My front door doesn't have a screen door and I've always wanted one out ther, well this works perfectly for it! It's much cheaper than buying a whole new screen door as well!! The set up is a bit of a hassle but once installed, it works like a charm!