1.If you just need to correct the heel position, you don’t need the other pads .
2.If you just need to correct the forefoot position, you don’t need the heel pads.
3.You can choose the pads according to your needs.
4.Fit for moderta to large volume shoes.
5.Take old insoles out to use the new one.
6.You can trim them if you need to.
7.Need 1-3 days to get used to these insoles.