Guides/SWIM NAPPIES - Quick guide

SWIM NAPPIES - Quick guide

What are swim nappies?

Swim nappies are specially designed to be worn in water with their main function being to stop poo from getting into the water. A swim nappy doesn't absorb water like a normal nappy does when it comes into contact with water. A swim nappy won't get heavier or difficult to move in, nor will it weigh your child down in the water. Our swim nappies are also washable and can be used again and again.


Why use a washable swim nappy instead of a single-use one?

In choosing a product that can be used again and again instead of having to throw it away after every use, you’ll be saving money and helping the environment.

How do they work?

A swim nappy keeps any waste in the pants and stops it from leaking out into the water.


Put the swim nappy trunks on just like you would normal swimming trunks. Make sure that the elastic around the legs, groin and waist is tight enough. If it is slack it means the trunks and too big and aren’t fit for purpose.

Which size should you choose?

Our swim nappies are sized according to weight. All the same, we recommend measuring children and consulting the size chart in order to make sure you get the right size. Children are very different - no two are built the same, so going on the weight specifications alone isn’t always reliable.

How do you measure your child correctly according to the size chart?

The most important things to measure are around the legs and waist and to ensure the elastic fits tightly around them.

Waist: Measure around the area of the waist where the nappy sits and compare this to the size chart.

Legs: This measurement should be taken at the highest point of the leg at the child’s groin.

Inner dimensions: The inner dimensions should be taken by measuring from the middle of the waist elastic at the front, underneath and between the child’s legs and up to the middle of the waist elastic at the back.

What to do if your child fits two sizes

Sometimes your child’s measurements may sit between two different sizes. The most important thing is getting the waist and leg measurements right, so let those be the deciding factor. It's essential that the trunks fit snugly around the legs to avoid any excrement leaking out into the water.

Does a swim nappy leak?

A swim nappy's job is to keep any poo inside the trunks. No swim nappy can stop urine from getting out. It might sound a little gross, but it’s not an issue since urine is sterile when it leaves the body, while the chlorine in the pool also helps to clean the water. Even with a single-use nappy urine will leak out.

Will it keep urine in?

No, it won’t keep urine in. In washable swim nappy trunks there are no absorbent materials and even if there were, that material would soak up not just urine, but also water. When the nappy is full the urine will mix with the water in the swimming pool in any case.
Having an absorbent material in the nappy would also make the nappy heavy and cumbersome, hampering your child’s ability to move freely and to float. Urine in the water does not pose an issue since it is in fact sterile. Chlorine in the pool also helps to purify the water.

Will a swim nappy keep diarrhoea in?

Diarrhoea will end up in the water a lot quicker than hard stool. So no, the swim nappy won’t keep diarrhoea in. If you are aware you child has diarrhoea it is probably best that you refrain from swimming for the sake of everyone’s well-being and enjoyment.

How long can poo stay in the nappy for?

The swim nappy should be changed as soon as it is soiled. If the poo remains in the nappy for too long it will eventually start to dissolve in the water and could end up seeping out into the pool water. So, the answer is not long at all. Get your child out of the water as soon as possible.

What do I do when my child poos in the nappy?

Get your child out of the water as soon as possible. Change the nappy. Flush the poo down the toilet and rinse out the swim nappy trunks. Store it in a wet bag until you get home. Wash it in the machine together with other laundry. We recommend that you have two swim nappies with you so that you have a spare clean one in case of any accidents.

How to wash your swim nappies

Rinse out the swim nappy and remove any chlorine, salt water, or urine residue. Wash at 60 degrees together with your other laundry.

When does your child need a swim nappy?

A swim nappy is pretty much essential until your child has learnt not to poo in nappies.

When can babies stop using swim nappies?

When your baby has stopped pooing in nappies and is able to say when they need to go to the toilet.

How often do you need to check the swim nappy?

It can be good to check the nappy 1-2 times per hour. Be mindful also of your baby's own signals. Taking slightly older children with you to the toilet 1-2 times per hour to see if they need to go can work well.

How often do you need to check the swim nappy?

It only needs to be changed when there’s poo in it.

Can it be tumble dried?

We don't recommend tumble drying the swim nappy as it can cause the material to deteriorate.

Avoid bleach

We don't recommend using bleach as it will affect the colours of the material. The material itself can also deteriorate.

Why are there no inserts in the nappy?

A swim nappy is designed to keep poo in the nappy so that it doesn't end up in the water. A swim nappy does not contain any absorbent material since this would cause it to also absorb the pool water and make the nappy heavy, cumbersome and weigh your child down in the water. An absorbent layer would not keep urine in anyway since it would mix with the normal water.

What are swim nappies made of?

Our new swim nappies are made from recycled fishing nets (!) with a waterproof PUL outer layer. The inner layer helps to keep poo in and stops it leaking out. Urine will seep out through the legs of the nappy but not poo. Our swim nappies are Oeko-Tex certified.

Why can children not use a normal nappy when swimming?

A normal nappy will swell up if it ends up in water and will be heavy and uncomfortable for your child. The extra weight can even alter your child’s centre of gravity and ability to move freely in water which in turn can be dangerous. Normal nappies are not suitable for playing in water nor are they allowed in public pools.

How do you know if swim nappies are permitted in public swimming pools?

Our swim nappy trunks have been authorised for use by the Swedish Baby Swimming Association, but each individual swimming pool has its own rules. Check beforehand with the pool to be on the safe side to avoid any disappointment.

Should children have anything under the swim nappy?

Nothing else is needed under the swim nappy.

Can the swim nappy be used as a normal nappy?

Since there isn't any absorbent material in the swim nappy trunks, they can't be used as a normal nappy. The elastic round the legs or waist does not ensure a sufficient enough leakage barrier for it to be used as a normal nappy.

Shop nappies here.