1、 Because the inside of the shoes is not easy to clean, the insole can be used to clean and keep the inside of the shoes dry.

2、 It can protect shoes. If the insole is not padded, the inner surface of the shoes may be worn out for a long time.

3、 The need to protect your feet. Put on the insole, so that the foot is not easy to wear, but also feel comfortable.

4、 The indirect way to adjust the size of shoes is that sometimes we may feel bigger when we buy shoes. For some reasons, we can't change them, so we can adjust the size by using the cushion.