NATTCOOL™ SLEEP TECH
Long sleeve top
Long sleeve top
$0.35 a night
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Sleep cool all night in this classic cooling pajama top.
The sleep benefits
The sleep benefits
Too hot to sleep? Keep cool every night with this cooling long sleeve:
- Engineered for ultimate moisture-wicking, drying three times faster than cotton
- 8x more breathable than cotton
- Twice as soft as cotton
“Even a small rise in body temperature during the night can have a major impact on our sleep. When we overheat, the body struggles to enter and maintain deep sleep — heart rate and stress levels increase, we wake more often, and true recovery becomes impossible. Dagsmejan’s Stay Cool collection is designed to counteract exactly that. Its intelligent cooling and moisture-management technology helps the body release excess heat and maintain the optimal temperature for restorative, high-quality sleep — night after night.”
— Dr. med. Lutz Graumann, Specialist in Sports Medicine, Nutrition & Regenerative Medicine.
Testing protocol: Flat testing | Torso testing | Real-life wear testing
Product details & care
Product details & care
Details
- NATTCOOL™ fabric: 93% lyocell and 7% elastane/ lycra
- A minimum of friction at night thanks to the flat ergonomic seams and slightly front placed side seams
- Tagless design, all care instructions are printed in the cooling long sleeve
Care
- Wash up to 40 degrees Celsius. Do not tumble dry. Do not bleach. Do not dry clean
- Care instructions are printed on the inside of the sleep long sleeve
Find out how to care for super-fine natural fibres in our care guide
Natural & sustainable
Natural & sustainable
NATTCOOL™ is made from eucalyptus trees and other natural fibers. Dagsmejan sources wood and pulp from sustainably managed forests and plantations. Eucalyptus uses 20 times less water than cotton and five times less premium farmland. Dagsmejan works with Lenzing, a global leader in sustainable and ethical fiber production.
- Eucalyptus fibres: Europe and Africa
- Sleep technology: Switzerland
- Knitting and dyeing of the fabric: Switzerland, Italy & Austria
- Garment making: Romania
Read more about Stay Cool
Fit & size
Fit & size
Fit:
- Loose-fitted
- Chest width (M): 111 cm (43.7″) +/- 6 cm (2.4″) per size
- Body length (M): 74 cm (29.1") +/- 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, CH 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 IN IT, LOVE IT OR RETURN IT
- DBDalius B.Verified BuyerReviewingLong sleeve top — NATTCOOL™I recommend this productMy sleep type I'm often warm and sometimes sweatRated 5 out of 5 stars11 seconds agoSuperb sleep ware
The best sleep ware that I ever had.
Helps 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 largeSleep comfort with Dagsmejan?Rated 5.0 on a scale of 1 to 5Poor ExcellentWas this helpful?