We want to customize a batch of backpacks. What are the specifications of commonly used backpacks?
The shoulder-back tolerance gauge is related to your use. Generally, ordinary people are between 30L and 50L. If you have more things, you should also have a larger capacity.
But at the same time, it also depends on your own conditions. If you have less equipment or are shorter in height, it is not suitable to carry a large-capacity bag.
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