Breathable, featherlight warmth
NATTWARM™ SLEEP TECH
Long sleeve top
Long sleeve top
$0.32 a night
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Powered by NATTWARM™ fabric — a patented blend of merino wool and eucalyptus fibres — this sleepwear keeps you comfortably warm without overheating.
The sleep benefits
The sleep benefits
Sleep better by staying comfortably warm without ever overheating. Experience the luxurious sleep comfort of nature's finest performance fibres.
- 4x more breathable than cotton
- With superior moisture transport, merino wool can absorb up to 35% of it's weight in moisture
- Naturally anti-smell
"Optimal thermoregulation and breathability are important factors for deep and restful sleep. Dagsmejan pyjamas keep our body in the ideal climatic comfort zone and take sleep to a new level."— Dr. Martin Schlott, Chief Physician for Anaesthesia and Intensive Care Medicine and Sleep Coach
Product details & care
Product details & care
Details
- NATTWARM™ fabric: 38% wool, 56% lyocell and 6% elastane/ lycra makes this the best thermal mens pajamas
- 100% traceable, mulesing-free NATIVA™ merino wool
- Cosy over-thumb sleeves and raglan sleeve for a natural range of movement
- Flat ergonomic seams and slightly front placed side seams mean that you have a minimum of friction at night
- Tagless design, all care instructions are printed in the stay warm pajamas for men
Care
- Wash your merino sleepwear in up to 30 degrees Celsius. Do not tumble dry. Do not bleach
- You can also find the care instructions printed on the inside of your garment
- Learn to care for super-fine natural fibres in our care guide
Natural & sustainable
Natural & sustainable
NATTWARM™ fabric is made of a blend of nature’s
performance fibres, that give you the ultimate breathable, warm sleepwear. Eucalyptus fibres for breathable softness. Luxury merino wool
for comfort and warmth. We use NATIVA™ 100% traceable, mulesing-free merino wool from certified farms in Uruguay.
- Merino wool: Uruguay
- Eucalyptus fibres: Europe and Asia
- Sleep technology: Switzerland
- Spinning of the yarn: Austria
- Knitting and dyeing of the fabric: Lithuania
- Garment making: Lithuania
Fit & size
Fit & size
Fit:
- Semi-fitted
- Chest width (M): 100 cm (3' 3″) +/- 6 cm (2.4″) per size
- Body length (M): 75 cm (2' 5″) +/- 1 cm (0.4″) per size
Model information:
Free returns & comfort guarantee
Free returns & comfort guarantee
Sleep in your Dagsmejan sleepwear for up to 14 days, if you don't love it return it for a full refund. Free returns from the US, the UK and the EU.
Free delivery for all orders above 150 USD.

































Size Guide

SIZE | XS | S | M | L | XL | 2XL |
EU/DE/CH | 34-36 | 36-38 | 38-40 | 42-44 | 46 | 48 |
Chest | 79.5-84.5 | 85.5-89.5 | 90.5-95 | 96-101 | 102-107 | 108-113 |
Waist | 63.5-68.5 | 69.5-73.5 | 74.5-79 | 80-85 | 86-91 | 92-97 |
Hip | 87.5-92.5 | 93.5-97.5 | 98.5-102.5 | 103.5-107.5 | 108.5-112.5 | 113.5-117.5 |
Inleg length | 78 | 78 | 78 | 78 | 78 | 78 |
SIZE | XS | S | M | L | XL | 2XL |
US | 4-6 | 6-8 | 8-10 | 12-14 | 16 | 18 |
UK | 8-10 | 10-12 | 12-14 | 16-18 | 20 | 22 |
Chest | 31.3-33.3 | 33.7-35.2 | 35.6-37.4 | 37.8-39.8 | 40.2-42.1 | 42.5-44.5 |
Waist | 25-27 | 27.4-28.9 | 29.3-31.1 | 31.5-33.5 | 33.9-35.8 | 36.2-38.2 |
Hip | 34.4-36.4 | 36.8-38.4 | 38.8-40.4 | 40.7-42.3 | 42.7-44.3 | 44.7-46.3 |
Inleg length | 30.7 | 30.7 | 30.7 | 30.7 | 30.7 | 30.7 |

SIZE | S | M | L | XL | 2XL |
EU/DE/CH | 46-48 | 50 | 52-54 | 56 | 58-60 |
Chest | 91-97 | 98-103 | 104-109 | 110-115 | 116-121 |
Waist | 80.5-85.5 | 86.5-90.5 | 91.5-96 | 97-102 | 103-108 |
Hip | 94.5-99.5 | 100.5-104.5 | 105.5-109.5 | 110.5-114.5 | 115.5-119.5 |
Inleg length | 82.5 | 83 | 83.5 | 84 | 84.5 |
SIZE | S | M | L | XL | 2XL |
US/UK | 36-38 | 40 | 42-44 | 46 | 48-50 |
Chest | 35.8-38.2 | 38.6-40.6 | 40.9-42.9 | 43.3-45.3 | 45.7-47.6 |
Waist | 31.7-33.7 | 34-35.6 | 36-37.8 | 38.2-40.2 | 40.6-42.5 |
Hip | 37.2-39.2 | 39.6-41.1 | 41.5-43.1 | 43.5-45.1 | 45.5-47 |
Inleg length | 32.5 | 32.7 | 32.9 | 33.1 | 33.3 |
Sleep better with men's merino pajamas

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Breathable, featherlight warmth
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NATTWARM™ Technology
NATTWARM™ Technology
The NATTWARM™ fabric offers ultra light warmth. Against fabrics such as cotton and bamboo, NATTWARM™ is more warming than textiles up to 50% heavier. Studies show that we can sleep up to 15 minutes longer with merino sleepwear by falling asleep faster and enjoying a deeper sleep.
-
Luxurious blend of merino wool and eucalyptus
Luxurious blend of merino wool and eucalyptus
NATTWARM™ is made of a blend of performance fibres, that give you breathable, warm sleepwear. Eucalyptus fibres for softness and merino for comfortable warmth. We use NATIVA™ 100% traceable, mulesing-free merino wool from certified farms in Uruguay.
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Recommended by sleep experts
Recommended by sleep experts
"Body temperature and sleep are inseparably linked, the right temperature is essential for good sleep. Dagsmejan’s sleepwear support the nightly changes in body temperature and thereby naturally improve sleep."
- Dr. Christine Blume, Sleep Researcher
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Breathable, featherlight warmth
Want to stay warm without ever overheating? Discover what the most comfortable merino pajamas for men can do for your sleep comfort.
- 50% lighter warmth than other thermal sleepwear
- 4x more breathable than cotton
- 2x softer than cotton -
NATTWARM™ Technology
The NATTWARM™ fabric offers ultra light warmth. Against fabrics such as cotton and bamboo, NATTWARM™ is more warming than textiles up to 50% heavier. Studies show that we can sleep up to 15 minutes longer with merino sleepwear by falling asleep faster and enjoying a deeper sleep.
-
Luxurious blend of merino wool and eucalyptus
NATTWARM™ is made of a blend of performance fibres, that give you breathable, warm sleepwear. Eucalyptus fibres for softness and merino for comfortable warmth. We use NATIVA™ 100% traceable, mulesing-free merino wool from certified farms in Uruguay.
-
Recommended by sleep experts
"Body temperature and sleep are inseparably linked, the right temperature is essential for good sleep. Dagsmejan’s sleepwear support the nightly changes in body temperature and thereby naturally improve sleep."
- Dr. Christine Blume, Sleep Researcher

SLEEP IN IT, LOVE IT OR RETURN IT
- SMShevonne M.Verified BuyerReviewingLong sleeve top — NATTWARM™I recommend this productMy sleep type I'm often warm and sometimes sweatRated 5 out of 5 stars5 months agoFor my husband - his 3rd set
He is a big fan of these pyjamas so I got us his and hers sets for our anniversary.
He is much sweatier than me and whilst mine haven't worn out, his older ones have. So he is glad for the new ones.
Sleep comfort with Dagsmejan?Rated 5.0 on a scale of 1 to 5Poor ExcellentHelps to regulate temperature and moisture?Rated 4.0 on a scale of 1 to 5Poorly, I'm too warm/ cold/ sweaty Excellently—I'm comfortableHow is the sizing?Rated 0.0 on a scale of minus 2 to 2Runs small True to size Runs largeWas this helpful? - DNDavid N.Verified BuyerReviewingLong sleeve top — NATTWARM™I recommend this productMy sleep type I'm often coldRated 5 out of 5 stars5 months agoBrilliant
This is a comfortable, lightweight top. Although light it is warm and soft and helps me get a good nights sleep. I love that it uses natural components and not made in PRC. I really like this item.
Sleep comfort with Dagsmejan?Rated 5.0 on a scale of 1 to 5Poor ExcellentHelps to regulate temperature and moisture?Rated 5.0 on a scale of 1 to 5Poorly, I'm too warm/ cold/ sweaty Excellently—I'm comfortableHow is the sizing?Rated 0.0 on a scale of minus 2 to 2Runs small True to size Runs largeWas this helpful? - BRBrett R.Verified BuyerReviewingLong sleeve top — NATTWARM™I recommend this productMy sleep type I'm sometimes warm and sometimes coldRated 5 out of 5 stars5 months agoLove it
This is my favorite top to sleep in. It is warm and controls temperature very well.
Sleep comfort with Dagsmejan?Rated 5.0 on a scale of 1 to 5Poor ExcellentHelps to regulate temperature and moisture?Rated 5.0 on a scale of 1 to 5Poorly, I'm too warm/ cold/ sweaty Excellently—I'm comfortableHow is the sizing?Rated 0.0 on a scale of minus 2 to 2Runs small True to size Runs largeWas this helpful? - TGTodd G.Verified BuyerReviewingLong sleeve top — NATTWARM™I recommend this productMy sleep type I'm often warm and sometimes sweatRated 5 out of 5 stars5 months agotop notch
love my top and matching bottoms. Very comfortable, great fabric and nice fit. I bought two sets!
Sleep comfort with Dagsmejan?Rated 5.0 on a scale of 1 to 5Poor ExcellentHelps to regulate temperature and moisture?Rated 5.0 on a scale of 1 to 5Poorly, I'm too warm/ cold/ sweaty Excellently—I'm comfortableHow is the sizing?Rated 0.0 on a scale of minus 2 to 2Runs small True to size Runs largeWas this helpful? - JSJeet S.Verified BuyerReviewingLong sleeve top — NATTWARM™I do not recommend this productMy sleep type I'm often coldRated 2 out of 5 stars5 months agoNot warm at all
I was looking for some warmth in my night suit but if feels cold. Not sure what wool is used. Waste of money for me.
Sleep comfort with Dagsmejan?Rated 2.0 on a scale of 1 to 5Poor ExcellentHelps to regulate temperature and moisture?Rated 2.0 on a scale of 1 to 5Poorly, I'm too warm/ cold/ sweaty Excellently—I'm comfortableHow is the sizing?Rated 0.0 on a scale of minus 2 to 2Runs small True to size Runs largeWas this helpful?