Main Design
MAIN Mini · Children's swimwear

Feel good. Do good.

Style and comfort combined.

Made for movement. Even for the little ones.

Freedom of movement

Soft, stretchy fabrics for swimming, playing, and romping around.

UV Styles for Sunny Days

Discover long-sleeved swimsuits and UV shirts. You can find information about UV protection for each model.

Designed with love

Swiss design, crafted with our long-standing partners in Bali.

Get dressed. Dive in. Be a kid.

A swimsuit should be ready for every adventure. Our girls' styles combine soft fabrics with thoughtful cuts – for the pool, swimming lessons, and seaside holidays.

Whether a sporty one-piece or a bikini: Here your little water lover will find her favorite look.

For wild waves and little breaks.

From the first splash to the next surf attempt: Our boardshorts and UV shirts offer plenty of room to move.

The Aina UV shirt fits loosely like a T-shirt and can be easily combined with the Lean or Nolan boardshorts.

Main Design
Children's Bath Poncho Flow
Regular price CHF 49.90
Lagoon teal
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Dusty lavender
Main Design
sage green
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Ocean Blue
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Terracotta
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+ 1
3-6 years 7-12 years
Poncho

After the water: snuggle up.

Our Flow swim poncho made of soft muslin can be slipped on quickly – for a break after splashing around and the trip home from the pool.

Children's Bath Poncho Flow
Regular price CHF 49.90
Lagoon teal
Main Design
Dusty lavender
Main Design
sage green
Main Design
Ocean Blue
Main Design
Terracotta
Main Design
+ 1
3-6 years 7-12 years

Small favorites. Mindfully made.

Depending on the model, our children's swimwear is made from recycled materials. The exact composition is listed directly on the product page.

We design in Switzerland and work closely with our production partners in Bali. We support Healthy Seas with 1% of our online sales.

Good to know – Children’s swimwear

Which size is right for my child?

Use the height and the information for the respective model as a guide. Age is just a guideline. Our children's size chart will help you. Not sure? Write to us at info@maindesign.ch.

Which children's swimwear offers UV protection?

In our collection, you’ll find UV shirts and long-sleeved swimwear. You can find the specified UV protection rating directly on each product page. The clothing protects the skin it covers; remember to also seek shade, wear a sun hat, and use sunscreen on exposed skin.

Is there swimwear for babies?

Yes, you can find our baby styles in the Baby and Unisex Collection. You can see which sizes and colors are available on the product page.

How do I care for the swimwear?

After swimming, rinse with clean water and allow to dry in the shade. Follow the care label. Rough pool edges and other rough surfaces may damage the fabric.

Can I exchange it for a different size?

You can return suitable items within 14 days of receipt. They must be unworn, unwashed, and have their original tags, as well as intact hygiene stickers if applicable. For an exchange of size, send us an email. You can find details and exceptions in our Returns FAQs.

Main Design
For little people with a great love of water.

Ready for the next leap?