I was skeptical at first, but given our two year old might as well be a FISH and can darn near swim all in his own, I knew disposable swim diapers would end up costing us a fortune this summer. Washed them as soon as they arrived and had the kiddo in the water by the end of the day. Fit comfortably... Even more so than Swimmers or Splashes. Didn't bother him around the leg or waist at all. Not bulky and doesn't swell up like disposable swim diapers. Zero problems. Even our local YMCA approves of them. Will definitely recommend to every parent I know with diapered kiddos!