Custom orthopodiatric insoles are used as prevention; correction or may be accommodative.
Prevention insoles are widely used by at-risk people, such as the ones having Diabetic Foot, in order to prevent ulcers thus avoiding the risk of amputation.

Corrective insoles are particularly used in children to correct or prevent improper foot support.
Mechanical insoles can be used by adults; elderly, rheumatoid foot among other cases, aiming to accommodate the foot thus improving the comfort and decreasing both pressure areas and pain, by acting on all these critical areas.