I am just getting into the insole game the last couple years, never had customs, have very flat, fat, duck/hobbit feet.
Fwiw I have learned that even with completely collapsed arches, we still need and greatly benefit from arch support. Depending on the foot, boot, and insole, how much arch is the tricky bits...I don't go for a ton, but notice the support in aftermarkets for sure anyway.
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