The coolest sleep comfort
NATTCOOL™ SLEEP TECH
T-shirt
T-shirt
$0.27 a night
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This cooling sleep t-shirt is engineered for a cool sleep comfort even when the temperature rises.
The sleep benefits
The sleep benefits
Too hot to sleep? Experience a deeper and long sleep with the best cooling pajamas t-shirt for men.
- 8x more breathable than cotton
- NATTCOOL™ combines smooth softness with superior moisture management
- Drying in 1/3 of the time of cotton
“Sleep, temperature and comfort are functionally linked. For a good night you need feel comfortable warm, not cold, nor hot. Dagsmejan Sleepwear implements two basic principle for a good night of sleep in one product: It helps you maintain the right temperature through the night and it fabric feels so comfortable that it is a true pleasure and reward to wear.” — Dr. Roy Raymann, Sleep Neuroscientist and Ambulatory (Sleep) Technology expert, holding a PhD in Sleep & Thermoregulation
Product details & care
Product details & care
Details
- NATTCOOL™ fabric: 92% lyocell and 8% elastane/ lycra
- 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 men' cooling sleep t-shirt
Care
- Wash up to 40 degrees Celsius. Do not tumble dry. Do not bleach. Do not dry clean
- The care instructions are printed on the inside of the men's sleep t-shirt
- Learn to care for super-fine natural fibres in our care guide
Natural & sustainable
Natural & sustainable
Made from eucalyptus trees and other cellulosic fibres NATTCOOL™ is not only exceptionally cooling but also exceptionally sustainable. The botanic fibres used by Dagsmejan comes from natural forests and sustainably managed plantations. Eucalyptus requires 20 x less water and 5x less high-quality farmland than cotton.We work with Lenzing, one of the most sustainable producers of fibres worldwide.
- Eucalyptus fibres: Europe and Africa
- Sleep technology: Switzerland
- Knitting and dyeing of the fabric: Switzerland, Italy & Austria
- Garment making: Romania
Fit & size
Fit & size
Fit:
- Semi-fitted
- Chest width (M): 102cm (3' 4″) +/- 6 cm (2.4″) per size
- Body length (M): 75cm (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 cooling pajamas

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The coolest sleep comfort
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NATTCOOL™ Technology
NATTCOOL™ Technology
This fabric cools you down and keeps you dry through moisture evaporation and transport. With great moisture management and temperature regulating properties compared to other fibres such as cotton, bamboo and synthetic fabrics. No more night sweats with the best men's cooling pajamas!
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Cooling eucalyptus
Cooling eucalyptus
NATTCOOL™ fabric is based on Eucalyptus. Eucalyptus is nature's environmentally friendly high tech fibre. Requiring up to 20x less water and 5x less farm land than cotton. Sleep easy knowing that these super soft eucalyptus pajamas don't contribute to an adverse impact on the environment.
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Recommended by sleep experts
Recommended by sleep experts
"Thermoregulation is key for good sleep. To fall asleep and enjoy a deep, restorative sleep we need our body temperature to drop. I recommend Dagsmejan; their pajamas help us to cool down or warm up depending on our needs to sleep deeper for longer."
— Dr. Lutz Graumann
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The coolest sleep comfort
Stay cool all night, every night with Dagsmejan's cooling pajamas for men.
- 8x more breathable than cotton
- Dries in 1/3 of the time of cotton
- Releases water vapour 60% better than cotton -
NATTCOOL™ Technology
This fabric cools you down and keeps you dry through moisture evaporation and transport. With great moisture management and temperature regulating properties compared to other fibres such as cotton, bamboo and synthetic fabrics. No more night sweats with the best men's cooling pajamas!
-
Cooling eucalyptus
NATTCOOL™ fabric is based on Eucalyptus. Eucalyptus is nature's environmentally friendly high tech fibre. Requiring up to 20x less water and 5x less farm land than cotton. Sleep easy knowing that these super soft eucalyptus pajamas don't contribute to an adverse impact on the environment.
-
Recommended by sleep experts
"Thermoregulation is key for good sleep. To fall asleep and enjoy a deep, restorative sleep we need our body temperature to drop. I recommend Dagsmejan; their pajamas help us to cool down or warm up depending on our needs to sleep deeper for longer."
— Dr. Lutz Graumann

SLEEP IN IT, LOVE IT OR RETURN IT
- RRichardReviewingT-shirt — NATTCOOL™I recommend this productRated 5 out of 5 stars6 days ago5 Stars
Love the color and the fit is great!
Was this helpful? - DDaynaReviewingT-shirt — NATTCOOL™I recommend this productRated 5 out of 5 stars1 month ago5 Stars
Husband loves his new jammies! Now no more gym shorts to bed!
Was this helpful? - RPRobert P.Verified BuyerReviewingT-shirt — NATTCOOL™I recommend this productMy sleep type I'm often warm and sometimes sweatRated 4 out of 5 stars1 month agoVery comfortable and cool.
I enjoy the coolness of this top and love the material. For a large it is a little snug. Would get an XL next time, and try the pajama top button down. Frankly I still get warm and remove it during the night… though glad to have it.
Sleep comfort with Dagsmejan?Rated 4.0 on a scale of 1 to 5Poor ExcellentHelps to regulate temperature and moisture?Rated 4.0 on a scale of 1 to 5I'm too warm/ cold/ sweaty I'm very comfortableHow is the sizing?Rated -1.0 on a scale of minus 2 to 2Runs small True to size Runs largeWas this helpful? - MIMalcolm I.Verified BuyerReviewingT-shirt — NATTCOOL™I recommend this productMy sleep type I'm often warm and sometimes sweatRated 5 out of 5 stars1 month agoIt works...
It fits well, looks good and does what it says it will!
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 5I'm too warm/ cold/ sweaty I'm very comfortableHow is the sizing?Rated 0.0 on a scale of minus 2 to 2Runs small True to size Runs largeWas this helpful? - JCJohn C.Verified BuyerReviewingT-shirt — NATTCOOL™I recommend this productMy sleep type I'm often warm and sometimes sweatRated 5 out of 5 stars2 months agoBest t shirt for sleeping
I’ve used this shirt for 3!weeks and it has helped reduce my sweating immensely. My wife hates washing it every night so I have to buy more.
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 5I'm too warm/ cold/ sweaty I'm very comfortableHow is the sizing?Rated 0.0 on a scale of minus 2 to 2Runs small True to size Runs largeWas this helpful?DDagsmejan2 months agoDear John,
thank you for your great review.We are happy to hear your feedback, that your Dagsmejan sleepwear helps you to regulate your body temperature.
Our collections are equipped with antibacterial & anti-odour properties.
This means that this fabric still feels pleasantly fresh even after several nights of wear.
You can also simply air the items on a hanger by an open window and do this for several days in a row without having to wash them.Best wishes and we hope to see you again soon.
Your Dagsmejan team