Answer:
Iron on a mammal. Mammal on your feet.
My life can be measured in hours, I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
What zips through the sky with a tail of fire and dust. It could be an omen, its origin to discuss?
Slayer of regrets, old and new, sought by many, found by few.
My sides are firmly laced about, Yet nothing is withinอพ You'll think my head is strange indeed, Being nothing else but skin.
If itโs information you seek, come and see me. If itโs pairs of letters you need, I have consecutively three. What am I?