Our Gruezi Sleeping Bag Range Explained
May 13, 2025
So far there have been two natural insulations, each of which is outstanding. There is the light and also excellently insulating down, and the moisture-resistant and climate-regulating wool. The disadvantages of down, it is very sensitive to moisture and cannot compensate for the climate, the disadvantage of wool is that it is very heavy.
But that has now changed with Grüezi Bag DownWool. DownWool combines the best properties of down and wool. DownWool is light, highly insulating, less sensitive to moisture and has climate-regulating properties.
What is DownWool Exactly?
DownWool is the combination of down and wool. Wool is shot into the core of the down. This anchors the wool to the down. This makes the insulation washable. Wool is more greedy for moisture than down, which relieves the down when it gets wetter. Wool has a structure with many small capillaries in which it can absorb and release more than 30% of its own weight in moisture.
When it gets cold, wool draws moisture away, leaving you dry and warm. But when it gets too warm, wool releases the moisture again and there is a slightly cooling effect.
DownWool Temperature Regulation
Wool garments offer superior insulation and breathability compared to other fabrics of similar structure and weight. This insulation capacity has made wool synonymous with warmth, yet because wool is an active fibre, it also has a cooling effect on the wearer.
Sweating generally serves the body’s temperature regulation and has as a natural cooling effect on the skin’s surface. Potentially, clothing can obstruct this process, causing overheating.
However, sheep wool’s process of vapour transfer results in cooler muscles that are able to work at higher intensity levels, making it a far superior material compared to other fibres.
What is DownWool 2.0?
New for 2026, the improved insulation performance of DownWool 2.0 is achieved through an additional production step in which the wool acquires a finer structure and significantly more loft. This allows the wool to trap more air, thus increasing the insulation performance while maintaining the same fill weight. DownWool 2.0 now achieves the warmth-to-weight ratio of pure down. Read our guide here: Gruezi Bag Downwool 2.0 Sleeping Bags
Grüezi Sleeping Bags stands out with their innovative DownWool insulation that combines the excellent warmth and low weight of down with the moisture-wicking and temperature-regulating properties of wool. This patented blend allows the sleeping bag to maintain a comfortable microclimate, preventing you from getting too hot or too cold.