What is an example of a mantle?

Could you please provide me with an example of a mantle? As I understand from the paragraph, it seems to refer to a type of clothing or covering, but I'm not quite sure about its exact form or purpose. Could you elaborate a bit on this, perhaps with a specific instance or scenario where a mantle might be worn? I'm particularly interested in how it differs from other garments and how it might be utilized in different cultures or historical periods.