The size of the backpack

The backpack carrying system has a specific scope of application. Although the adjustable backpack has a larger scope of application, it is not unlimited. Therefore, it is very important to choose the size of the backpack system. What size is appropriate? Generally speaking, the waist point of the backpack should be on the waist socket above the tailbone, and the fulcrum of the shoulder strap should be roughly level with the shoulder and slightly lower than the shoulder, so as to facilitate the adjustment and force of the stress belt and make it comfortable to carry. If the size of the back is too large, it will cause a feeling of falling, otherwise, it will have a feeling of verticality, which will make the waist not in place. After the proper size is adjusted, the backpack will naturally stick to the back, which is very comfortable.