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
Tax included Shipping calculated at checkout.

The Swim Diaper is your tiny changemaker’s answer to washable and fashionable swimwear.

Designed with care, it features a soft polyester lining and a 100% PUL (Polyurethane Laminate fabric) outer layer. The elastic-lined legs and waist are thoughtfully crafted to capture solids, while the specially designed natural lining allows liquids to pass through.

  • Size 1: Suitable for newborns up to 6kg
  • Size 2: Designed for 5kg to 11kg
  • Size 3: Ideal for 9kg to 16kg

Remember, every child is unique, so the sizes and weights provided are guidelines only.

Enhance your swim adventures with our Mini Bag or Midi Bag—a perfect addition to your little one's swimwear essentials.


WATER-RESISTANT PRODUCTS (The Wrap, The Wet & Dry Bag, and The Bag):

  • Pre-wash with a short cold cycle
  • Then machine wash at 40° using non-eco powder detergent
  • Line dry in shade
  • Do not tumble dry

The Wrap, The Wet & Dry Bag, and The Bag -

  • Made of 100% PUL (Polyurethane Laminated Fabric)
  • It's water-resistant, quick-drying, and easy to clean, featuring the Billie Wonder logo for that extra touch.

Items currently in stock will be shipped within 2 business days. Once your order is shipped, a shipping confirmation email, including a tracking number, will be sent. Shipping costs are calculated at checkout and are free within The Netherlands for orders exceeding €100.

We accept returns for any reason, as long as they comply with the following conditions:

  • All items must be returned within 30 days of receipt.
  • Products must remain unused, unworn, unwashed, and undamaged.

To initiate the return process, kindly fill out the return form.

Please note the following regarding return costs:

  • Full order return costs within The Netherlands are covered by Billie Wonder.
  • Partial order return costs in the Netherlands, as well as full and partial return costs outside the Netherlands, are the responsibility of the customer.

Please be aware that sale items are non-refundable and cannot be returned.

Tiny Changemakers...