I have twin boys who refuse to potty-train. The cost of disposable diapers is prohibitive to actually going to the beach or pool! These cloth diapers were a fantastic money saver. After many, many washings and many wearings, they're no longer pure white, but perhaps that's more of a statement of my laundering skills. They still function perfectly, though, and saved us a ton. They can be worn alone or under a swim suit.