Some shoes stink, while others don't. What's the matter? Is it the material of the shoes?

stinky or not has little to do with the material of shoes, because manufacturers will not choose materials that stink as soon as they wear them. That's not to ruin their business! In fact, it is mainly the chemicals such as glue selected by the manufacturer during the production process. Generally, new shoes should not be worn directly. Scientifically speaking, they should be washed first, and then put in a cool and ventilated place to dry, so that those chemicals can volatilize. There is another factor. Shoes come with insoles. If they are soft foam, they will stink easily. It is recommended to change insoles frequently.