The reason why the insole is not 2cm high is because it has little effect and can't increase the effect. Generally, it is not obvious when viewed from the outside.

The purpose of heightening the insole is to increase the visual effect of the user's height, which is mainly used to enhance the image of the user's height and some long and short legs caused by diseases. Inner heightening insole, also heightening insole, belongs to a kind of functional insole.