NORDISK

SIRIUS EXP

Product USP

Living up to NORDISK’s core promise of delivering “the highest feel-good factor” under any circumstances, this highly functional sleeping bag is engineered to be the safest and most comfortable expedition sleeping bag to sleep in to date. In its standard configuration – filled with RDS-certified European White Goose Down – it is rated for temperatures below -30°C, with a tested limit temperature of -35°C. Thanks to NORDISK’s own manufactory in Germany, the bag’s filling quality and filling weight can be individually tailored for expeditions in even more extreme conditions, with configurations supporting temperatures as low as -50°C.

Developed in close collaboration with current and former members of the Sirius Dog Sled Patrol in Greenland, the SIRIUS EXP was purpose-built for months-long extreme expeditions in the unforgiving Greenlandic wilderness.

One of the most distinctive features, directly inspired by the Sirius Patrol, is the pair of arm zippers located on each side of the bag. These allow the user to free their arms for urgent tasks – such as responding to a polar bear alarm or handling equipment – without sacrificing core warmth.

Intended specific end use:

With the SIRIUS EXP down sleeping bag, NORDISK set out to create the ultimate Arctic sleeping bag – one that combines decades of expertise with groundbreaking innovation to ensure the safest and most comfortable sleep in the world’s harshest environments.

Fun facts or backstory:

"The SIRIUS EXP sleeping bag is as packed with a backstory as it is with down. As for this extraordinary product development project, the NORDISK R&D department teamed up with past members and active reservists of the Sirius Dog Sled Patrol in Greenland, an elite Danish naval unit conducting long-range reconnaissance patrolling and enforcing Danish sovereignty in the Arctic wilderness of northern and eastern Greenland.

As a result of this collaboration, there are hardly any sleeping bags out there right now, that have been tested, discussed and refined, tested and adjusted more often than SIRIUS EXP.

Just to name a few. The first SIRIUS prototype alone saw 418 kilometers of skiing in the North of Norway with a former Sirius Patrol member, another Sirius man took the second SIRIUS to Swiss Alps and back to the North of Norway on yet another extensive test trip. All along the way NORDISK received invaluable insights and feedback to massage into further product development and sampling. All culminating in one final product test in full expedition environment. SIRIUS was selected by two former Sirius Patrol members to take part in a 4-week expedition to Northeast Greenland with over 700 kilometers of ice, snow and white-outs covered on skis. The final word on the SIRIUS EXP: Do not change a single thing on the sleeping bag!

And as if working with ex-elite “winter soldiers” would not be enough we enrolled two Finnish backcountry skiers to look at SIRIUS EXP with a different set of eyes and take the bag for another staggering 4-week ride in harshest conditions from the North Cape in Norway down to Arctic Finland. Yet another challenge mastered by SIRIUS.

Oh. You asked for a fun fact? Here is one. Talking about the ideal length of a sleeping bag zipper with former elite soldiers can at times lead to some astonishing revelation – that in the end will in fact inform the length of the zipper. Imagine, when nature calls during the night in a minus 30 degree centigrade environment. One might only want to be able to open the sleeping bag just enough to answer that call. Every inch of zipper opened for nothing would just result in a hard loss of warmth from inside the bag. So, it became a task to take this into serious SIRIUS consideration."

Designed by: Georg Hansen, Anders Donskov
Product material:
Shell: 7D Toray NEXT TO NOTHING® Ultralight Nylon, rip-stop with NorTech 0.5 membrane, 42 g/m², PFAS-free
Lining: 7D Toray NEXT TO NOTHING® Ultralight Nylon, rip-stop, 25 g/m², PFAS-free
Filling: CRYSTAL DOWN® European White Goose Down, 95/5 800+ cuin (EU), 850+ cuin (US), RDS-certified

Weight: 2050 g, 1500 g of which is “just” the immense amount of down we put into this extreme comfortable beast
Available in stores: Spring/summer 2026
Recommended retail price: SIRIUS EXP will be marketed as a tailor made offer at first. RRP therefore depends on the amount and quality of down used as well as on further customization.