Note: I do not wear them all day, just to drive to and from work, and for walk into the building from the parking lot (hike!). It is best not to wear the same pair of shoes two days in a row, in order to let them dry out thoroughly between wearings. As soon as the white ones are broken in, or my feet toughen, I will not wear them twice in a row for even that little bit.
So kids... don't try this at home. I am a professional on an unlimited shoe budget. Your mileage will vary.
These are the ones I changed into at the office... cool, huh?