Compared to upper, structure of sole is much simpler. In design of sports shoes, role of sole cannot be ignored. A shoe consists of an upper and a sole that are one piece, so we must understand that whether it is a themed design or a concept design, never separate bottom and upper for separate processing. Instead, they should be unified throughout shoe and styled as one of components.
The outsole is simpler than upper in terms of shape design, and even a fraction or less of visual weight of a pair of shoes, but we shouldn't underestimate it because of that content. Only when top and bottom are combined into a single whole can high-level work be developed. Thus, simplicity and complexity of upper, beauty and simplicity, lightness and heaviness, depth and shallowness, lightness and darkness, fullness and thinness - all this directly affects shape of sole. help, they complement each other and are inseparable.
In specific production work, consider principle of economy. The sole often needs to be matched with different uppers, but no matter how many uppers are matched, it must be done within a common framework, i.e. sole can only be considered as an existing part, and then it can be designed according to style characteristics of that piece Extended design. It is necessary to make upper and sole a single whole, so that finished shoes turn out to be harmonious and beautiful.