Baby long sleeve bodysuit

$49.90 USD

The softest and lightest warm baby pajamas you can dream of. This merino wool pajamas is 4x more breathable than cotton and will keep your baby cozy warm without overheating. Shhhleep well with the finest, 100% traceable merino wool!

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Color: Dark grey melange
Size Guide Ruler
  • Ultra-light warmth, 4x more breathable than cotton, makes this the ideal baby winter pajamas
  • Easy changing and opening
  • Expandable sleeves, legs and torso means that you can use your baby pjs for up to 6 months.
  • Flat, ergonomic seams
  • The softest baby pajamas—2x softer than cotton: tagless & lightweight, super soft fabric with 4-way stretch
  • NATTWARM™ fabric with 100% traceable merino wool: 38% merino wool, 56% Lyocell from eucalyptus and 6% elastane/ spandex
  • 100% toxic free—Independent tests by the renowned Institute Fresenius show absolutely no harmful substances or chemicals have been used
  • Garment should fit snugly - this garment is not flame resistant

Wash your merino wool pajamas baby up to 30 degrees Celsius. Do not tumble dry. Do not bleach.

Sleep better with Dagsmejan Stay Warm baby pajamas

Featherlight, breathable warmth

Super-fine merino wool

Featherlight and breathable Dagsmejan Stay warm baby pajamas will keep your little one comfortably warm without ever overheating. With the finest merino wool and eucalyptus fibres your baby can sleep deeper and longer

- 4x more breathable than cotton, as warming as other fabrics up to 50% heavier

- 2x softer than cotton

- Easy changing

- Extendable sleeves and leg cuffs


Sleep science. mum proven.

Nature's performance fibres

NATTWARM™ fabric has been specially engineered to offer featherlight light warmth. Tested against fabrics such as cotton, bamboo, and synthetics, NATTWARM™ is more warming than textiles up to 50% heavier making it ideal as warm baby pajamas. 

Dagsmejan baby sleepsuits are designed to provide ultimate night comfort for longer. With extendable cuffs and torso you can provide your loved one a better sleep night by night. 


Nature's thermostat

Super-fine merino wool

NATTWARM™ fabric is made of a blend of nature’s performance fibres, that give you the ultimate breathable, warm sleep comfort. Lyocell from eucalyptus, nature’s high tech fibre, for breathable softness. The softest merino wool for comfort and warmth. We use NATIVA™ 100% traceable merino wool, coming only from certified farms in Tasmania. 

All steps of the production process of Dagsmejan sleepwear are Oekotex certified to ensure that we take care of not only our customers but also the environment.




Dagsmejan nightwear for mums and babies is not only scientifically proven to boost your night comfort. 30 mums and babies have also been testing our nursing pjs and baby sleepsuits during the development, their feedback has incorporated into the product designs to give you the most comfortable sleepwear imaginable. Mum proven. 


Sleep comfort guarantee

Sweet dreams come at no risk

Let your baby try Dagsmejan stay warm pajamas for 14 days, if they don't love the soft night comfort you can return it for a full refund. 

Product Reviews

Product FAQ

How long do the benefits of the Stay Warm sleepwear last?

The benefits of the Stay warm baby pyjamas are permanent and won’t wash away. 

How have the benefits been confirmed in testing?

Independent testing has proven the unique benefits of NATTWARM™ fabric, this include flat testing and torso testing by EMPA, a Swiss federal institution for innovation in materials & science. The testing show that NATTWARM™ is ideal as thermal sleepsuit as it offers the same warmth as other fabrics up to 50%, is 4x more breathable than cotton and 2x softer. Merino wool pajamas baby can also absorb 35% of their weight in moisture vs 7% for synthetics.

Is Dagsmejan Baby sleepwear tested by real mums and babies?

Dagsmejan sleepwear for babies is not only based on sleep research and scientifically testedit's also tested and approved by real babies. During the development process 30 mums and babies were sleeping in Dagsmejan and their feedback has been incorporated into the product design. Read more about their experience with Dagsmejan's Mum&Baby sleepwear.

Which natural fibres do you use?

The NATTWARM™ yarn in Dagsmejan's merino wool pajamas for babies is made of 38% Merino wool, 56% Lyocell from Eucalyptus and 6% elastan/spandex for recovery and stretch.

Is the merino wool mulesing free?

We use 100% traceable, mulesing-free NATIVA™ merino wool from farms in Tasmania that focus on the wellbeing of all animals in their care. All steps of the production process of Dagsmejan baby sleepwear are Oekotex certified to ensure that we take care of not only our customers but also the environment.

How can I wash and care for merino pajamas?

You can wash the Stay warm baby pajamas in up to 30 degrees Celsius. Do not tumble dry. Do not bleach. Do not dry clean.

In case of milk stains or other difficult stains, treat the garment with the following steps:

- rinse off with cold water and pre-treat with a stain remover of choice

- gently scrub the area with an old toothbrush and let soak for 10/15 minutes

- wash in cold water and let dry in the sun

You can also find the care instructions printed on the inside of your garment.

How can I find the right size for my baby?

Check out our size guide and if you have any questions you can always contact us at

What should I combine the Dagsmejan baby sleepsuit with?

We recommend – depending on the season and the room temperature – to pair the Dagsmejan baby sleepwear with a sleepingbag. This way your baby keeps a deeper sleep without sudden temperature drops and stays safely covered during the night.