To identify the quality of shoes, we need to look at both the appearance and internal indicators. Since internal indicators often require the help of testing instruments, it is more practical for a consumer to identify the quality of shoes from the appearance. From the appearance, the quality of shoes is mainly identified by the quality of the materials (including uppers, soles, and linings) and the workmanship. The size can be measured, and the craftsmanship is mainly based on visual inspection, hand touch, pinching, and pushing.
Outsole
From the appearance, the bonding state of the outer sole periphery should be closely bonded without gaps, and the bottom surface should be flat.
