1. Down sleeping bag:
The down sleeping bag achieves insulation by the expansion of the down and forming an air warm layer. In order to provide full expansion space for the down, the professional down sleeping bag is three-dimensional suture, that is, the material and fabric of the sleeping bag are not directly sewn together, but connected by an upright lining. In this way, the space in the sleeping bag is transformed from a pocket into a box, thus ensuring the expansion space of the down.
From the above description of the structure, it can be seen that no matter what kind of folding method you use, the three-dimensional space in the sleeping bag is actually flattened. Therefore, for the down sleeping bag, you can theoretically use any kind of stacking method. However, from our practical experience, the crammed sleeping bag has better compressibility than the rolled up sleeping bag. And theoretically speaking, the randomly packed sleeping bag is very random in the folded part, and it will not cause a certain part to be aged due to long-term repeated folding; instead, the rolled-up sleeping bag will have a relatively fixed folding, making it It is more prone to aging. However, we must not be too strict, because the aging is only theoretically speaking, in actual use, because the zipper is damaged, scratched and caused the sleeping bag can not be used far more than the case of sleeping bags due to the accumulation of aging is much larger.
In addition, the down sleeping bag should be stored in a bag that is twice the size of the original sleeping bag when it is not used for a long time, so that the down will not affect the bulkiness due to long-term compression.
2. Hollow cotton sleeping bag:
Hollow cotton sleeping bags are produced with the development of man-made fiber technology. In addition to warming through the expanded fiber gap, the hollow fiber interior can also be kept warm. Therefore, it is worse than the down sleeping bag which can still have partial thermal performance when wet, but its compressibility and weight are not as good as down materials, so it cannot fully replace down products.
Similar to down sleeping bags, most of the hollow cotton sleeping bags also use a three-dimensional structure, so you can also use two kinds of stacking methods. Here we don't suggest that method is better, I believe you will gradually develop a fixed habit in use
3 ordinary cotton sleeping bags:
The compressibility of ordinary cotton sleeping bags is far worse than that of the two types of sleeping bags. If you use a random insertion method, it may be more difficult. If you think about it, you will realize that random insertion will create a lot of gaps. The compressible material will fill these gaps sufficiently, and the poorly compressible material will only partially fill the gap, resulting in a larger volume.
For an ordinary cotton sleeping bag, a sleeping bag with poor compressibility, we recommend that you use a roll-up and folding method, which not only allows you to easily put in a sleeping belt cover, but also saves a certain volume.
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