Why do the soles of travel shoes turn yellow?

The sole material is cheap and there are no ingredients to resist yellowing. High temperature, sunlight, and long time will cause it to turn yellow.

Mechanical methods:

1. Toothpaste brush;

2. Grinding the surface with very fine-grained grinding wheels, sand bars, and oilstones;

3. If you can't handle it yourself, entrust the shoe repair shop to handle it.

Chemical method:

1. Surface color change spray painting treatment: professional treatment by the shoe store master (adding treatment agent, curing agent, paint);