While standard nappies are designed to contain liquids and solids, swim nappies work a little differently. They don't absorb as much liquid as a standard nappy, so that they don't soak up water from the pool and weigh your baby down. This means swim nappies will only contain solid stools, not urine. Each swim nappy was weighed, soaked in water for five minutes, then reweighed to see how much water it had absorbed. Ease of use

Pampers Splashers Size 3-4, 12 Disposable Swim Pants, 6kg

We filled each nappy with a peanut butter and water mixture, designed to replicate a solid stool, and put it on the doll. Not sure what reusable nappy to choose for your baby? See the best reusable nappy brands according to parents. Next, we submerged the doll into a baby bath filled with water and moved its legs around for three minutes to replicate the movements a baby makes when swimming.We washed the reusable nappies according to the manufacturer instructions to assess how well it cleaned after the peanut butter and water mixture had been inside it. Parent testing

Pampers Size 5 Splashers Baby Nappy Swim Pants Pampers Size 5 Splashers Baby Nappy Swim Pants

Yes. Reusable swim nappies are designed to be worn on their own. As long as they fit securely, they should contain any poo until you're able to take your child out of the pool. Keep in mind they aren't designed to hold in solid stools for an extended period of time, so you should leave the pool as soon as you notice your baby's nappy needs changing. Can you use a reusable swim nappy on its own?