The best replacement for flat feet is arched feet.

The best alternatives to flat feet are rated as following:
★★★★★  arched feet
★★★★  fallen arches
★★★★  high arches
★  low arches
★  normal feet
★  high arch
★  fallen arch
★  arch feet
★  over pronation
  arched
  overpronation
  low arch
  pronation

Your alternative for flat feet is not listed? Suggest!
Speaking about flat feet, one probably shouldn't forget about pronation.

Other search terms related to flat feet and their ratings are:
★★★★★ pronation
★★★★ supination
★★★ ankle pain
★★★ underpronation
★★ plantar fasciitis
★ vibrams
You have in mind a companion for flat feet and it is not yet here? Propose!



Google Trends

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flat feet
arched feet
fallen arches