I'll never buy another disposable swim diaper again! We started our 3 yr old boy on swim lessons, and these were required. My son is potty-trained, but we got these "just in case," with the swimming being a new experience and him being in a strange place, etc, I didn't want to take any chances. I really wish I had known about these sooner! My boy is rather slim, so I bought a 24 month and a 3T. The 24 month was too small, and the 3T is quite snug. Understandably so, though, since total containment is the objective. I'm giving 4 starts, since I can't really rate this item's performance as a diaper because my little one doesn't really use it as a diaper. Other moms I've talked to do love them, and had I bought them sooner, I think they would have performed very well. They are very well-made and seem like they would contain well around the leg openings and the waist. I have never put mine in the dryer (and never will!), so I don't know how they'll stand up to that kind of wear and tear. Style-wise, they are adorable. Had I known these existed, I would have never used disposables. These work better and keep waste out of landfills. Why don't more people know about these?