Billie Wonder swimdiapers in all three designs
child wearing swim diapers, showing embroidered logo on back
Billie Wonder swim diapers in all three sizes
Billie Wonder swim diapers in all three designs
Billie Wonder swimdiaper in black
Billie Wonder swimdiaper gold design
Billie Wonder swim diaper not white design
Billie Wonder swim diaper in black with complementary mini bag
Billie Wonder mini wetbag complementary with swim diaper, modelled
The Swim Diaper
The Swim Diaper
The Swim Diaper

The Swim Diaper

Regular price€24,90
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The Swim Diaper is your tiny changemaker’s answer to washable and fashionable swimwear.  

It consists of a soft polyester lining and a 100% PUL (Polyurethane Laminate fabric) outer layer. The elastic-lined legs and waist catch solids, whilst the specially designed natural lining allows liquids to pass through.

Available in 3 sizes, and in our 3 signature logo design colors and MAMA'EN collection prints, The Swim Diaper also features an embroidered red logo on the back. 

Keep in mind, every child is different so sizes and weights below are guidelines only.

Size 1 - NB till 6kg

Size 2 - 5kg till 11kg

Size 3 - 9kg till 16kg

The Mini Bag or The Midi Bag are a perfect addition for swim outings.


In stock items ship within 2 business days.  A shipping confirmation email, with tracking number, is sent once your order has shipped. Shipping costs will be calculated at checkout and are free within The Netherlands for orders above €100,-.

We accept returns for any reason, as long as they comply with the below. To start your return process please click here.

- All items must be returned within 30 days of receipt.

- All products must be unworn and unwashed

- Full and Partial order return costs in the Netherlands and outside of the Netherlands are paid by the customer. In case of full order return, initial shipping costs will be refunded to the customer. 

- Sale items are non-refundable and cannot be returned.

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