If you sleep well, you start the day rested and fit. A balanced sleeping climate perfectly created by Alpine wool gives the ideal conditions to achieve this. Exactly what the Alpine wool that is in the Grüezi bag sleeping bags does! The Alpine wool used in their sleeping bags acts like a natural air conditioning system: Our body releases moisture all the time. Too much humidity in the sleeping bag makes us get cold – putting a good night’s sleep out of the question. Wool has the fascinating property of being able to absorb moisture only releasing it again in doses. There is no evaporation cooling in our Alpine wool sleeping bag, because wool still warms perfectly even when wet!