First of all, starting with the shoulder strap, since it is called a backpack, collectively referred to as a backpack, then speaking of backpacks, straps are very important.
High-quality shoulder straps are generally designed with reinforcement and strong bearing capacity. Moreover, the shoulder straps will be quite thick and smooth.
On the contrary, we look at ordinary backpack shoulder straps. In order to save costs, the reinforced design is usually omitted, and the shoulder strap design is relatively thin and not smooth enough.
Let's look at the buckles on the shoulder straps of high-quality backpacks. They are generally wide, thick and stable.
The production is also relatively fine, without impurities such as plastic burrs.
However, the shoulder straps of ordinary backpacks are generally made of recycled plastic, which of course can reduce the production cost. However, everyone knows that secondary materials are easy to break, and the stability of such fasteners will be much worse.
The backpack zipper with good hardware zipper will be smoother when it is pulled together, and there is rarely any sticking phenomenon.
The handle design of the zipper will also be more careful. The handle will be designed to be relatively large and thick with sufficient texture.
The zippers of inferior ordinary backpacks are mostly cheap zippers, not only the bearing capacity is not enough, but also the general handles are relatively light and light, and have no texture.
Look at the inside of the backpack generally speaking, the high-quality backpack should have good practicability, and should be smooth and orderly, and use high-density polyester.
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