Buying a backpack is a very complicated thing. There are many factors to consider. You must not only look at the appearance or the capacity. The correct way is to find a backpack that suits you. However, the advantage is that now the common backpacks in China can be adjusted. Yes, because professional mountaineering bags are equipped with a carrying system, we can see the values ​​of M and L at the shoulder straps of your backpack.

So where should it be adjusted? This needs to consider the length of our own torso. In professional terms, it is the length from the iliac crest to the C7 vertebra. The iliac crest is the top of the hip bone. The way to find the C7 bone is also very simple. The most prominent vertebra is the C7 vertebra, because this bone is all in the back, so we can only ask others to help measure it, and then you can find the corresponding comparison table on the Internet, and use your torso length to know that you should be carrying the system. Adjusted to that size.
First we put the pack on the shoulders, then put the middle part of the waist belt on the iliac crest, then tighten the waist belt, to make it tight enough, the bayonet of the waist belt should be placed in the middle of the body, this will create a very good position for you Good piggyback foundation. There is also the distribution of the weight of the backpack, which is a problem that many novices will ignore. The backpack with the carrying system can transfer the center of gravity of the backpack. The correct operation method is to put 80% of the weight on the hips and the remaining 20%. on the shoulders.