DownWool hybrid insulation

DownWool Hybrid – extra-warm insulation for arctic temperatures

Unlike DownWool® insulation, the DownWool hybrid construction is not a mix of materials, but a layered construction. 

What does layered construction mean?

With DownWool hybrid insulation, down and wool are used separately in different chambers. Only 100% goose down is used in the chambers closest to the body. A layer of alpine wool is placed over these chambers. This way, the excellently insulating down is encased in a layer of alpine wool.

This unique construction is used in the Grüezi bag® winter and expedition sleeping bags, which are designed for comfortable temperatures well below freezing.

Why layered construction?

The great advantage of this design is that the moisture generated in the sleeping bag is wicked away.

Moisture evaporates inside the sleeping bag and condenses on the inside of the outer shell at sub-zero temperatures. There, it drips onto the down filling. In pure down insulation, this weakens its insulating properties.

DownWool Hybrid offers a fundamentally new solution to this problem. The wool layer in Grüezi bag® hybrid sleeping bags absorbs the droplets and releases them to the outside, into the cold surrounding air. In this way, wool stabilizes the insulation, ensures a consistently dry climate, and prevents heat loss when wet.

Why is DownWool Hybrid the better down?

When down becomes damp (e.g. due to condensation, sweating or humid air), the fine branches of the down collapse, the down clumps together and the insulating capacity decreases considerably.

The wool layer prevents this:

• Wool naturally keeps the down drier and fluffier, thus maintaining the down's insulating properties.
• It thus ensures effective regulation of moisture and body temperature.
• Wool absorbs moisture and releases it to the outside in a controlled manner. This regulation allows for a warming or cooling effect, creating a dry, comfortable body climate.
• Even when wet, it retains its warming properties, something no other material can do.

The result is an outstanding and unique insulation in which the down remains dry and fluffy, so that it retains its excellent insulating effect even at extremely low temperatures well below -15 °C.