What makes the FuzziBunz One Size DIFFERENT than all of the other One Size diapers on the market today? It comes with REPLACEMENT PARTS! The last thing you want to happen when your baby reaches age two and is not yet potty trained is to have your reusable diapers go out on you!! With our Patent Pending Easy Replace Elastic system - you can adjust the sizing internally without a maze of snaps on the front and if it goes out you can easily replace it! We TRULY put the REUSE in Reusable Diapers!