I'd have thought no harm in trying - better than soaked feet
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but if he tries to run in them...more tripping potential

See what he makes of them in the shop - some LOs act like their feet are glued to the floor when they first put them on, I remember DS eventually lifting his legs up high like his feet had suddenly grown enormous

but on the other hand DD hadn't been walking as long when she first tried them, but didn't seem bothered by them at all.