The quality and grade of backpacks are mainly determined by several aspects:
1. Workmanship. Every corner and thread pressing is neat, without thread off and jumper. Every stitch of embroidery is exquisite, which is the standard of high technology.
2. The material used for backpacks is generally 1680D double-ply fabric, which is relatively medium, while 600D oxford cloth is generally used. In addition, materials such as canvas, 190T and 210 are usually used for backpacks of simple belt pocket type。
3. The back structure of the backpack directly determines the use and grade of the backpack. For outdoor mountaineering or military backpacks, the structure of the back is relatively complex. More than six pieces of pearl cotton or EVA should be used as breathable pads, and even aluminum frames. The back of the ordinary backpack is made of a 3MM pearl cotton as a breathable plate. The simple bag type backpack has no padding material except the backpack itself.
The quality of backpacks depends not only on the material, but also on the production experience of backpack manufacturers. Generally speaking, the longer the operation time, the richer the production experience and the better the production process. In addition, backpacks of different grades are suitable for different occasions, mainly depending on the choice of personal leisure and outdoor hobbies.