Answer:
I am used when you jump off a bridge for fun.
You throw me out when you use me and take me in when you are done.
lighter than feather and softer than silk yet the strongest man in the world cannot hold me for more than a few minutes.
Draw fire or fill me; I'm still empty.
I am an English word that is as long as I am valued.
A man goes out in heavy rain with nothing to protect him from it. His hair doesn't get wet. How does he do that?