Matthew Poole and continuators on 2 Kings 1:8

8 And they answered him, He was an hairy man , and girt with a girdle of leather about his loins : and he said, It is Elijah the Tishbite.

Either, 1. As to his Body; the hair of his Head and Beard being through neglect grown long, and spread over much of his Face. Or rather, 2. As to his outward Garment, which was rough and hairy, such as were sometimes worn by Eminent Persons in Greece, in ancient Times; and were the proper Habit of the Prophets. See Isa. 20. 2. Zech. 13. 4. Mat. 3. 4. Heb. 11. 37.

As Iohn the Baptist also had; Mat. 3. 4. That by his very outward Habit, he might Represent Elias, in whose Spirit and Power he came.