Meeting our physiological sleep needs
Swiss-engineered sleep innovation
At Dagsmejan, sleepwear isn’t designed — it’s engineered.
Born in Switzerland, our five proprietary textile technologies translate sleep science into the world’s most intelligent natural fabrics — tested, proven, and trusted by sleep experts worldwide.
Sleep at your ideal temperature
NATTWELL™
Beechwood fibres engineered to have both hydrophilic and hydrophobic properties to perfectly balance heat and moisture — keeping your skin dry and your body in perfect harmony all night.
- 6 x more breathable than cotton
- 4x better at drawing night sweat away from the skin
- 2x softer than cotton
"I recommend sleepwear by Dagsmejan; they help us to cool down or warm up depending on our needs so that we can sleep deeper for longer." –dr Lutz Graumann, Phd & sleep expert.
Testing protocol: Flat testing | Torso testing | Climate chamber | Real-life wear testing
Cool comfort when nights heat up
NATTCOOL™
NATTCOOL™ has millions of nano capillaries leading excess heat away from the skin. If you start to sweat, parts of the sweat are absorbed in the core of the fibres cooling you down through evaporative cooling.
- 8x more breathable than cotton
- Dries in 1/3 of the time of cotton
- Releases water vapour 60% better than cotton
“It helps you maintain the right temperature all night — and feels so comfortable, it’s a true pleasure to wear.” — Dr. Roy Raymann, PhD, Sleep Neuroscientist & Thermoregulation Expert
Testing protocol: Flat testing | Torso testing | Real-life wear testing
Light warmth that breathes
NATTWARM™
NATTWARM™ fabric combines lightweight warmth with exceptional breathability and moisture management. The blend of super-fine merino wool and botanic fibres transport excess heat away from the body so you stay comfortably warm without overheating.
- 50% lighter warmth than other fabrics
- 4x more breathable than cotton
- 2x softer than cotton
"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, Anaesthesia & Intensive Care Medicine; Sleep Coach
Testing protocol: Flat testing | Torso testing | Real-life wear testing
Boost you recovery – Athlete proven
NATTRECOVER™
The responsive minerals used in NATTRECOVER™ recycle excess body heat which is released naturally during sleep—transforming it into far infrared energy and re-directing it back towards the body.
- Reactive mineral fabric promotes increased blood flow to muscles, enhancing the recovery.
- Breathable with temperature regulating technology
- Worn by top athletes worldwide
"Dagsmejan enables my players to have the best rest they can get and to deliver the best performance when it matters." — Patrick Fischer, Head Coach Swiss National Ice Hockey Team
Testing protocol: Flat testing | Torso testing | Real-life wear testing
Better skin health – clinically proven
NATTSENSITIVE™
NATTSENSITIVE™ contains zinc which has a regenerative impact on the skin giving it the soothing comfort it needs at night:
- Rated 75% better for skin friendliness
- Rated 62% better for skin tolerance
- 10x more breathable
- Rated 4x better for sleep quality
"Dagsmejan has developed a new kind of sleepwear that is helping to sooth skin irritation while we sleep, making sure we get the nightly rest we need and deserved." – Dr. med. Werner Voss— Specialist in Dermatology
Testing protocol: Clinical testing | Flat testing | Torso testing | Real-life wear testing
Independent testing
Swiss engineered | Scientifically tested | Sustainably certified
At Dagsmejan, every collection is developed in collaboration with leading sleep scientists, material engineers, and universities across Europe. Our R&D follows a rigorous, six-step testing and validation process — ensuring that each collection delivers measurable benefits for your sleep.
1. Understanding Sleep Needs
– Research & physiological insight
Working with sleep experts, neuroscientists, and academic partners, we analyse how temperature, moisture, and comfort impact sleep cycles. This foundation guides every innovation we create.
2.Developing Smart Fabrics & Designs
–Targeted performance by need
Material scientists and textile engineers transform research insights into intelligent natural fabrics — based on a particular need a targeted solution is developed.
3. Laboratory Testing
– Objective proof of performance
Each fabric undergoes independent lab analyses including flat, torso, and climate-chamber testing with Swiss Federal Laboratories for Materials Science and Technology EMPA. We measure moisture wicking, drying speed, breathability, and thermal regulation under real physiological sleep conditions.
4. Dermatological & Clinical Testing
– Validated by science and medicine
Where relevant, fabrics and finishes are tested in dermatological or clinical studies — for example, the NATTSENSITIVE™ was tested in a double blind study through Dermatest and received the 5-star seal.
5. Wear & Fit Testing
– Real people, real nights
We conduct wear trials with participants across age, gender, and skin profiles.Their feedback fine-tunes our designs — from seam placement to sleeve length —ensuring exceptional comfort in real sleeping conditions.
6. Independent Quality Assurance
– Certified safety and sustainability
All materials are verified by external institutes and certifications including OEKO-TEX® Standard 100, bluesign®, FSC®, PEFC®, and NATIVA™. Each garment is checked by independent quality agencies before reaching you.
