Boyd’s Bible Dictionary:

Used by Hebrews
(2 Kings 1:8; Matt. 3:4).

Concise Bible Dictionary:

Elijah is described as a “hairy man, and girt with a girdle of leather” (2 Kings 1:8). The same Hebrew word is many times translated “skin.” In the New Testament John the Baptist had about his loins a “leathern girdle” (Matt. 3:4); or “of a skin” as in Mark 1:6. We read of Simon a tanner (Acts 9:43; Acts10:6, 32); and the monuments show that the art of tanning was practiced in Egypt, so that without doubt it was also known to the Israelites.
Leather to be dyed at a Moroccan tannery.