Which sleeping bag is good?
It always depends on what you do with it!
Which sleeping bag is best? Synthetic sleeping bags are ideal for camping, biking, festivals, or for children. They are durable, dry quickly, and can be easily washed. However, if you want to save weight and it can get colder, you need down. It insulates much better for the same weight. It also creates a more comfortable sleeping environment. So, if you want something inexpensive and simple, synthetic sleeping bags are a good choice; for a better climate and more warmth with a smaller pack size, down sleeping bags are recommended. If you're touring in very humid areas (tropics/ocean), synthetic sleeping bags or wool sleeping bags should also be considered. If you want an all-rounder that's resistant to moisture and offers a good climate, a wool sleeping bag is the right choice.
There are significant differences in quality among synthetic fiber sleeping bags. Fibers are divided into hollow and solid fibers. Hollow fibers are the higher-quality fibers. Fibers that are not only hollow but also consist of multiple tunnels are called multi-hole fibers. High-quality sleeping bags utilize these fibers. To further increase the air storage capacity, the fibers can be coiled. These fibers are called spiral fibers. Grüezi bag has also welded the spiral multi-hole fibers in three dimensions in its sleeping bags to achieve the best volume and thus the best air storage (heat).
Wool-filled sleeping bags are truly versatile. They can be used even in damp conditions and offer excellent climate control.
Wool sleeping bags can be used almost anywhere. They have the advantage of providing the optimal climate and are resistant to moisture. This means that a wool sleeping bag can also be used in damp environments such as on a boat, by a river, or by the sea, while trekking and camping, and at home.