To be honest, since my 14 month old is wearing them, she won't tell me if they would wear comfortably for more than a few hours at a time, no have we tested it.  And as for the arch support - it looks like not much there but again, she won't tell me.  :)<br /><br />These shoes are super cute and we get tons of complements on them.  They are very easy on and off and she seems to walk wonderfully in them.  My only concern was the stitching on the velcro straps.  We had to fix some of it as the material was pulling away from the velcro part within the first 3 days of wearing.  Simple hand stitching and back out to play.  So overall, I'd highly recommend these.