Because the white hat is a sign that you are into nurse completely "from head to toe", and realizes that there must be a professional responsibility to be a good nurse and according to the expectations of society.
The white hat is a sign that it has entered into a nursing completely. "From head to toe," and realize that they have a professional responsibility. And a nurse at the expectations of society.
Because the white hat is the mark that into a nurse by complete "from head to toe". And the realization that there will be professional responsibility And the nurse's great expectations of society.