Choosing insoles for flat feet
Compare the support, cushioning and fit of each insole. Flat feet do not always cause symptoms, and not everyone needs the same type of support. If your feet are painful, ask a podiatrist about suitable footwear and insoles.
Read about flat feet and collapsed arches · What are orthotics? · All orthotic insoles
Will insoles permanently change my arches?
Insoles support the foot while worn. Do not choose an insole on the expectation that it will permanently change your foot shape.