Flat feet (fallen or low arches) usually roll inward more than average when they load — which is why flat-footed runners are steered toward stability shoes. Modern stability has moved past hard plastic posts: today it means guide rails, wider platforms, and firmer foam along the inner edge that gently discourages the arch from collapsing. The picks below come from SoleHunt's recommendation engine, run with a flat-arch, overpronation-aware profile — ranked for genuine support features rather than marketing labels. If you also overpronate heavily, our overpronation guide covers the mechanics in more detail — the two conditions usually travel together.