Winter sleeping bag for demanding expedition tours
The "Biopod DownWool-Hybrid Ice Extreme" is a sophisticated sleeping bag with DownWool Hybrid insulation, a sophisticated baffle construction, and an integrated carbon heating element for emergency use. It was developed for use well below freezing for winter expeditions.
Grüezi bag® sleeping bags offer the best sleeping comfort and functionality
Grüezi bag sleeping bags have received numerous awards for their excellent insulation and well-thought-out designs.
-
DownWool hybrid construction for drier down : With conventional winter sleeping bags, moisture often condenses on the inside of the outer material, dripping onto the down and reducing its insulation performance. Grüezi bag® takes an innovative approach: A layer of Alpine wool reliably protects the high-quality, animal welfare-certified (RDS-certified) European goose down (fill power 800+ cuin) from moisture. The wool layer absorbs the resulting moisture, transports it to the outside, and keeps the down permanently dry. The result: optimal protection against moisture from both inside and out – and consistently high insulation performance.
-
Wider temperature range: DownWool hybrid sleeping bags have a wider temperature range in which you feel comfortable. Wool balances out temperature fluctuations.
-
More sleep, more energy: The body needs a lot of energy to regulate its temperature. Wool supports this process thanks to its excellent temperature-regulating properties.
-
Well-thought-out cut for optimal freedom of movement: The comfortable cut allows the body to assume a relaxed position, ensuring a peaceful, restful sleep. Even in the mummy shape, you can sleep more soundly, as you can turn around both on your side with your leg bent and within the sleeping bag.
-
Lightweight and small when packed: thanks to the body-fitting mummy shape.
-
Prevention of cold bridges: An Alpine wool layer construction on the top as well as an elaborate chamber system consisting of box and H-chambers (V-shaped) and additional side chambers guarantee even heat distribution, prevent cold bridges and ensure that the down does not slip.
-
Integrated carbon heating element: a backup for emergencies such as illness or a sudden drop in temperature (just 20 minutes of preheating is sufficient for the entire night).
-
Anti-slip studs: They prevent slipping off the insulation mat and thus ensure a stable sleeping place.
-
OEKO-TEX® STANDARD 100 certification: Grüezi bag® products are harmless to human health.
- Made in Germany
FEATURES
-
Adjustable hood with face baffle: The thermal baffle adapts perfectly to the shape of your head. When it's cold, only a small hole remains open, reducing heat loss from the face.
-
3D thermal collar: Closes automatically in the zipper area, so there is no cold bridge in the zipper area.
-
Drawstring pocket: To ensure that the drawstring on the thermal collar does not get in the way, it is safely stored in a simple drawstring pocket.
-
Inside & outside pocket: For valuables and things you prefer to keep close to you.
-
Two-way auto-lock zipper: The zipper can be opened and closed from either end, inside or outside. The auto-lock prevents it from opening accidentally.
-
White zipper: This makes it easier to find the zipper in the dark.
-
Zipper with anti-snag zipper and lined robust webbing: This makes the zipper even easier to operate without pinching the outer fabric.
-
Zipper with lined zipper cover: So that heat cannot escape and no cold bridges are created.
-
Elaborately pre-shaped foot box: With many chambers to avoid cold spots and plenty of space for the toes
-
Feater loops: The warming hip bag with heating element (Feater - The Feet Heater) can be installed additionally.
-
Chamber construction: Box chambers , H-chambers (V-shaped), additional sidewall construction , AlmWolle layer construction on the top
-
Removable carbon heating element in the foot area: The heating element can be operated with a standard power bank (USB port is located in the inside pocket) and is washable at 86 °F.
-
Heating time: The heating element heats up to a maximum of 104° F to achieve an optimal comfort temperature. Approximately 15-30 minutes are sufficient, after which the sleeping bag stores the heat and stays warm throughout the night.
-
Info: The operating time of a power bank with 5,000 mAh is approx. 1.8 hours / with 10,000 mAh approx. 3.6 hours.
-
Anti-slip nubs on the back: These prevent the sleeping bag from slipping on an insulation mat.
TECHNICAL DETAILS
-
Temperature range according to ISO EN 23537-1:
T comf 18 °F / T lim 5 °F / T ext -35 °F.
Optimal operating range from -25 °C (-13 °F) to 0 °C (32 °F).
For winter and expedition sleeping bags, the EN standard specifications (laboratory tests) are not very meaningful. Therefore, we provide additional temperature recommendations based on numerous practical tests.
-
Size: 84.6 x 34.3 x 20.9 inches (suitable for a body height of up to 6´2")
-
Weight: approx. 3.41 lb + stuff sack + heating element (approx. 0.1 lb)
-
Packed size: Ø 8.7 x 15.7 inches, compressed Ø 8.7 x 13 inches
-
Pack volume: 15 l, compressed 12.5 l
-
Outer and inner fabric: uncoated and therefore very comfortable, ultra-light, wind and water-repellent, robust and recycled 20 denier 380T nylon (100% polyamide).
-
Filling: 2,12 lbs high-quality goose down (80/20 with fill power min. 800+ cuin), additional layer on top: lavalan® AlmWolle made of 85 % virgin wool, 15 % corn starch (PLA) Ingeo™ - filling power 60 g/m²
-
Material labeling: Shell 100% polyamide, filling 1st layer: 85% wool/15% polylactide, filling 100% down – contains non-textile parts of animal origin.
-
Area of use: the optimal sleeping bag for winter mountain and trekking tours and expeditions well below freezing.
WHAT IS DOWNWOOL-HYBRID?
The special feature of this sleeping bag is its innovative hybrid insulation, which is naturally resistant to high humidity. In a DownWool-Hybrid sleeping bag, you'll immediately notice a wide comfort temperature range in which you feel neither too cold nor too warm.
This is achieved through an innovative layered construction of high-quality, animal welfare-certified (RDS-certified) European goose down (800+ cuin) and a layer of Alpine wool. This patented combination acts like a light, natural air conditioner.
Down: Excellent insulation performance – but only when dry
High-quality down insulates extremely well at a low weight. However, down clumps up in high humidity (air, sweat, condensation) and loses its insulating properties. Grüezi bag solves this problem with an innovative 2-layer construction of wool and down.
Wool: Effective moisture and temperature regulation
Thanks to the wool layer in the DownWool-Hybrid, the down stays naturally drier and thus retains its insulating power. In winter temperatures, the human body sweats up to 1.5 liters during the night. This moisture evaporates inside the sleeping bag, condenses on the inside of the outer shell in sub-zero temperatures, and drips onto the down, reducing its insulation. The wool layer in Grüezi bag® hybrid sleeping bags absorbs this moisture and releases it outward, keeping the down dry and insulating.
Wool can absorb up to 30% of its weight in moisture through its capillaries and slowly release it outward. DownWool-Hybrid regulates not only moisture but also body temperature. Wool prevents evaporative cooling and retains warmth even when damp – something no other material can do. It also naturally creates a cozy microclimate thanks to its unique climate-balancing properties. Additionally, wool neutralizes unpleasant odors.
The result: Excellent insulation and a wide comfort temperature range in which you can sleep well. DownWool-Hybrid is less sensitive to high humidity, making Grüezi bag® sleeping bags highly effective even below freezing temperatures.
WHAT IS A CARBON HEATING ELEMENT?
A sleeping bag only stores the heat emitted by your body. But sometimes, a person is too exhausted or ill to generate enough warmth to heat themselves or the sleeping bag – especially the foot area, which is notoriously hard to warm when your feet are cold. That’s why this sleeping bag includes an integrated heating element (Grüezi bag® Carbon Heating Element), which can be powered by a standard power bank.
The sleeping bag warms up to a cozy temperature in about 15 minutes.
The carbon heating element is designed to max out at around 40 °C (104 °F) to avoid sweating, which could otherwise lead to dampness and cold. It's integrated into the foot section, allowing heat to rise evenly upward, with enough distance from the body to ensure restful sleep.
The heating element is washable and can be washed along with the sleeping bag.
Please observe the warnings and safety instructions.
SUSTAINABILITY & CLIMATE RESPONSIBILITY
Grüezi bag® is a CO₂-neutral company.
Animal Welfare: RDS-certified (CU 859743), mulesing-free sheep wool from Europe
PFC-Free: No perfluorinated chemicals used
Water Repellency: Durable, eco-friendly impregnation based on bio-based raw materials (BeSoDRY-ECO)
Color: Selected BEMACRON dyes from CHT Group – non-toxic and meet Cradle to Cradle and bluesign® standards
Recycled Fabrics
Repair & Refill Service
Made in Germany
CARE INSTRUCTIONS
Washing
- The washing instructions are located inside the sleeping bag.
- Wash by hand or in a washing machine using a wool cycle and down detergent at max. 30 °C (86 °F). Turn inside out, close all zippers, run an extra rinse cycle, and do not use fabric softener.
- After washing, loosen up the sleeping bag and spin again at max. 600 rpm.
Drying
- Dry in a tumble dryer at max. 60 °C (140 °F) and always add 2–3 tennis balls to help fluff the filling.
- Repeat drying cycles as needed, removing the sleeping bag in between to fluff and cool it.
- Use a timed drying program to ensure the down is fully dry.
- If no dryer is available, lay the sleeping bag flat on a drying rack in the sun and shake it out frequently to allow airflow from above and below.
When is drying complete?
The sleeping bag should feel fuller and puffier than before. If it still feels flat, repeat the drying process. Depending on the fabric, drying may take at least two days.
Fully dry down should no longer smell. Damp down can smell musty, but this odor disappears once completely dry.
If not dried and fluffed properly, down can clump and permanently damage the sleeping bag.
Tips
Down sleeping bags should be tumble dried with tennis balls occasionally or after each trip to remove excess moisture.
Store open and dry in a storage bag – never compressed.
When packing, stuff the sleeping bag foot first into the compression sack – don’t roll or fold it.
Airing is better than frequent washing. Thanks to wool’s natural odor- and dirt-resistant properties, DownWool-Hybrid® sleeping bags rarely need washing. For minor stains, clean only the dirty area. If the entire bag is soiled, machine wash as described.
Always use a sleeping pad under the bag – insulation gets compressed underneath and can’t retain heat. More info on choosing the right sleeping pad can be found [here].
RECOMMENDED ACCESSORIES
Grüezi bag® sleeping bag warmer (increases comfort temp by up to 10 °C)
Replacement compression and storage bags
Grüezi bag® Wool Mat Camping or Wool Mat Camping Comfort – high-quality and comfy camping pads
FAQ
Our Faq's: Find answers to fit, temperature ratings, and more in our FAQs.
SHIPPING
Orders placed by 11:00 a.m. (weekdays) ship the same day.
Included: Sleeping bag, compression sack, storage bag.
MANUFACTURER
Grüezi bag is a brand of
Grüezi bag GmbH
Schmiedgasse 31
83075 Bad Feilnbach, Germany
Managing Director: Markus Wiesböck
Phone: +49 80 64 / 906 29 220
Email: info@gz-bag.de
Website: https://gz-bag-usa.com
