http://bit.ly/MagMesh
Magic Mesh Screen Door opens easily then closes itself behind you using 18 powerful magnets.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 too! Features: Easily walk through Installs in seconds, no tools required Great for pets 18 Powerful magnets magically closes Keep fresh air in and bugs out.
http://www.winfreestuffs.com/magic-mesh-screen-door-with-magnets-keep-air-in-bugs-out.htmls