Answer:
Split me in half, and you get me and another me. What word am I?
It is a common and favored clothing material among biker gangs and superheroes.
I make billions of dollars selling Windows. Who am I?
What is born on the ground but floats to the sky, to be returned back again from the clouds up high?
What has a hundred limbs, sometimes leaves, but cannot walk?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?