Do you know why some people feel that the soles of the shoes become much harder after they go back and wear shoes, making them particularly uncomfortable to wear? Generally, this situation is caused by the fact that the material of this outsole is not produced by some recycled materials. Therefore, when selecting outsole materials, ordinary shoe processing factories will require outsole manufacturers to use pure rubber to process outsoles. This is to increase the softness and comfort of the soles, and the most important thing is A little bit of this pure rubber outsole, it also has a good anti-slip effect. Therefore, when many women’s shoe brands are looking for shoe processing factories, they must request shoe manufacturers based on market demand. At the same time, this is also an important performance of a shoe company’s quality production.