Answer:
It is an arctic double breasted formal wear.
This thing runs but cannot walk, sometimes sings but never talks. Lacks arms, has hands; lacks a head but has a face.
What hangs others yet can unintentionally hang itself?
Iron roof, glass walls, burns and burns and never falls.
A caribbean shape that makes ships disappear
You use it between your head and your toes, the more it works the thinner it grows.