Answer:
I direct you from outer space.
I am an animal and a hair product
The more you take of me the more you leave behind.
I am easy to waste. I am unstoppable. What am I?
Without a bridle or a saddle across a thing I ride a-straddle. And those I ride by help of me though almost blind are made to see.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.