Answer:
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
I can be found in water but never wet
A hole in a pole. Though I fill a hole in white I'm used more by the day and less by the night
I must be broken before you can use me.
I go inside boots and outside shoes. What am I?
Pirates put their booty in it.