Four Hebrew words are translated as “mantle” in the Bible.
Hebrew: 'addereth, meaning: a large over-garment
This word is used of Elijah's mantle (1 Kings 19:13, 19; 2 Kings 2:8, 13, etc.), which was probably a sheepskin. It appears to have been his only garment, a strip of skin or leather binding it to his loins.
It was woven without seam, and was put on by being drawn over the head. It was worn not only by priests but by kings (1 Samuel 24:4), prophets (15:27), and rich men (Job 1:20; 2:12). This was the “little coat” which Samuel's mother brought to him from year to year to Shiloh (1 Samuel 2:19), a miniature of the official priestly robe.
Hebrew: Semikah, “a rug”