Consider the material of the insulation layer for sleeping bag
What kind of material the temperature insulation layer used in the sleeping bag is made of, to a large extent, determines the weight, volume, compressibility and durability of the sleeping bag. Nowadays, the materials used as the insulating layer of sleeping bags mainly fall into the following two categories:
Natural materials (mostly down)
The quality of this material is generally (gray, white) goose down or duck down (generally goose down is better than duck down), and its performance depends on the type of down used and the looseness of the canopy. In fact, down is still the best thermal insulation material for sleeping bags so far.
Advantages: the lightest, the best temperature insulation effect, can be compressed to the greatest extent, and the most durable.
In recent years, artificially synthesized sleeping bag insulation materials have emerged one after another. Many advanced synthetic materials are widely used in the insulation layer of sleeping bags. These materials are mostly hollow synthetic fibers, which are much better in quality and thermal insulation than ordinary chemical fiber cotton. However, it should be noted that although many man-made fiber manufacturers declare that their materials are better than down in performance, this is actually not the case.
Advantages: In a humid environment, although it is better than nothing, it has a better insulation effect than a damp down sleeping bag. Moreover, this kind of sleeping bag is easier to dry even after being damp. Its price is also lower than that of down sleeping bags.