cover instantly opens and magically snaps closed behind you using 18 strategically placed magnets. So if your hands are full, or if you have a forgetful family member, you can still let fresh air in and keep annoying bugs out! It goes up in seconds with no tools required and stays up all season long. Plus, it folds up for easy storage. Fits single doors, sliding doors, RV's and more! Instantly opens, magically closes. Great for pets to