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Firstly, watch the stitching. Stitching must be straight, crooked lines not only make bags out of shape, but also make people feel that it is defective.

Secondly, check the tightness of stitching, The stitching of poor quality bags is very loose, can be slackened easily. Bags with such stitching are easily broken. Good bags normally with tight stitching and double line sewing.

Finally, focus on the quality of thread. Generally cotton line fluffs, it is easy to break. Thread contains nylon is better and tougher. And, the thickness of the thread is also important, it can not only decorate the bags, but also make the bags more firmly.