Prem Merino All in One pink stripe
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PREM Merino All in One

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Premature babies thrive in merino. Why? Because they don't need to waste energy on warming up or cooling down. This energy can then be used for growth, which is exactly what you want!

An essential item for every baby, the All-in-One / onesie is perfect for day and night.

The cream kimono version features a cross over front with a dome leg opening with newly increased binding width around the domes.
The stripes have a double-ended YKK zip for ease of changing.

These are extremely soft and comfortable with all the wonderful features of 100% merino clothing. Layer up with a bodysuit for extra winter warmth.

To learn more about our merino and how to care for it, click here


  • Made from 100% merino wool
  • Meets Woolmark Nurtured Standard 
  • 18.5 micron, 180gsm
  • Striped version has YKK double-ended zips
  • Cream version is a cross over kimono style with reinforced snap fasteners under the legs
  • NZ fire safety: low fire Danger
  • See Description for Measurements
  • Watch our video on this product



Please note measurements may not always be exact due to variation, use this as a guide.


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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

4 Reviews Hide Reviews Show Reviews

  • Prem onsie

    Posted by Lynda Walter on 19th Aug 2019

    Just lovely ... and better even than pic ... good quality

  • It's perfect :)

    Posted by Kat on 19th Jun 2018

    Super fast delivery of an excellent product. The perfect size for my friends new little one.

  • Perfect outfit for prem babies

    Posted by Sonia on 12th Apr 2017

    Babu's all in one Merino onesie is perfect for little babies who arrive early. The fabric is soft and snuggly and easy to care for. Love how fast Babu deliver online orders too.

  • Perfect Prem Fit

    Posted by Unknown on 22nd Jul 2015

    So happy to have found an all in one that fits a prem baby perfectly. Thank you Babu

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