Athletes tend to overheat at night, in particular in summer. Dagsmejan’s Stay Cool sleepwear keeps them cool and boosts recovery—trusted by pros like Tudor Cycling and the Swiss national hockey team.

This article is presented by Dagsmejan

For elite athletes, performance isn’t built solely during intense training sessions or competitions—it’s also forged in the quiet, crucial hours of recovery. And central to that recovery is high-quality sleep. But for many athletes, especially in summer, restful sleep is often disrupted by overheating. That’s where Dagsmejan’s Stay Cool collection comes in, delivering cutting-edge sleepwear designed to regulate body temperature and help athletes—and anyone else who runs hot at night—sleep deeper and better.

Why Do Athletes Overheat at Night?

Athletes are known for having faster metabolisms, higher muscle mass, and more active circulatory systems, all of which contribute to greater heat production—even at rest. After a day of intense training or competition, the body remains physiologically “revved up” for hours, making it more prone to overheating during the night. Add summer heat, higher humidity, and the stress of upcoming events, and it’s no surprise that athletes often struggle to stay cool and sleep soundly.

Sleep deprivation or poor-quality sleep can severely impact physical recovery, cognitive performance, and even increase injury risk. That’s why more and more professional athletes are turning to science-backed solutions like Dagsmejan.

Dagsmejan Stay Cool: Sleepwear Engineered for Thermoregulation

The Stay Cool collection from Swiss sleepwear innovator Dagsmejan is built around one core idea: keeping your body in its optimal temperature zone throughout the night, so you can enjoy uninterrupted, restorative sleep—even in the heat of summer.

This is achieved through a high-performance blend of natural MicroLyocell fibers, derived from eucalyptus, that are superfine, breathable, and incredibly soft against the skin. These fibres have been engineered to offer:

• Superior moisture management – wicking sweat away from the body and drying twice as fast as cotton
• Exceptional breathability – releasing excess heat instead of trapping it, creating a cooling microclimate around the skin
• Featherlight comfort – the ultrafine knit feels almost weightless, promoting freedom of movement and airflow

Crucially, Dagsmejan’s technology isn’t just clever design—it’s scientifically validated. Independent testing by academic sleep laboratories has shown that Dagsmejan’s cooling pajamas supports better temperature regulation and sleep quality. Sleep trackers and biometric data confirm that wearers fall asleep faster, wake up less often, and sleep more deeply.

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100% Made in Europe with Natural Materials

In addition to high-tech performance, Dagsmejan is committed to environmental responsibility and ethical production. Every garment in the Stay Cool collection is:

• 100% made in Europe — with sustainable production partners in Austria, Portugal, Switzerland and Romania
• Crafted from renewable, botanical fibers — certified sustainable and sourced from responsibly managed forests
• Oeko-Tex certified — free from harmful substances and safe for both people and planet

This means you’re not only investing in better sleep—you’re supporting a cleaner, more conscious textile industry.

Trusted by Elite Athletes

Dagsmejan isn’t just a brand for sleep-conscious consumers—it’s become a trusted part of the recovery routine for world-class athletes.

Aline Seitz, Swiss national cyclist and Olympic hopeful, swears by the Stay Cool line to help her rest and recover ahead of major competitions:

“Besides training, sleep is the most important thing for me. Good, restful sleep enables me to perform at my best physically during training and in competition. I am glad to have discovered the Stay Cool line of Dagsmejan sleepwear. It allows me to sleep relaxed even in warm temperatures.”

Fabian Meeusen, Swiss Triathlon Champion, sees sleep as the foundation of all his physical gains:

“Every area is optimised in training, but sleep is the real base for my performance. Dagsmejan sleepwear has become an integral part of my sleep system since the first time I used it.”

Professional teams are integrating Dagsmejan into their recovery strategies as well:

• The Swiss national ice hockey team wore Dagsmejan’s during the Ice Hockey World Championship in May, helping players recover between high-intensity matches and stay cool under pressure during one of the sport’s most demanding tournaments.
• The Tudor Pro Cycling Team, backed by Fabian Cancellara, relies on Dagsmejan to enhance sleep and recovery during critical stages of their racing calendar. The team is wearing Dagsmejan now during the Tour de France to stay refreshed and restored troughout the Grand tours.

Cool Sleep, Peak Performance

Whether you’re a professional athlete, a dedicated weekend warrior, or simply someone who struggles with night sweats and warm summer nights, the Stay Cool collection from Dagsmejan offers a sleepwear solution that’s scientifically designed to help you rest deeper and wake up recharged.

When your body stays cool, your recovery improves, and your performance follows. Dagsmejan’s Stay Cool sleepwear combines natural innovation, European craftsmanship, and scientific validation to give athletes—and everyone—the edge that only better sleep can bring.

Discover the Stay Cool collection and make sleep your competitive advantage this summer.

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