I love the iPlay Ultimate Swim Diapers and have been using them instead of disposable swim diapers for a couple years now. I thought I'd try a different brand to see how they compare, but wasn't impressed, so I highly recommend these swim diapers. Last summer I double protected by putting swim trunks overtop of these white swim diapers. I am on our community's Board of Directors and if there is an accident in the pool we have to shut the pool down for about 24hrs or so. Not a good thing when residents want to enjoy the pool on a hot day and can't. This summer I am going to try the swim trunks and I won't double up because I trust the iPlay brand. You might want to take your baby / toddler's thighs into consideration when deciding on size, but AMAZON is a great company to work with if you order the wrong size, unused, with tags attached. I buy my son's current size and one size up as he frowns so fast. Last summer he needed the bigger size half way thru the season and it was nice having them on hand. Happy swimming!