Answer:
What has 4 eyes but canβt see?
My teeth are sharp, my back is straight, to cut things up it is my fate.
You can tumble in it, roll in it, burn it, animal eat it. Used to cover floors, still used beyond stall doors. Freshens whatever it is placed on. Absorbs whatever is poured into it.
What makes a loud noise when changing its jacket, becomes larger but weighs less?
I can move even when you are still. I can be one or many.
You use it between your head and your toes, the more it works the thinner it grows.