This adjective describes items made from animal skin or leather. Both New Testament occurrences refer to John the Baptist's distinctive clothing, specifically his leather belt or girdle. This detail connects John to the prophetic tradition, particularly Elijah, who wore similar attire. The leather belt was part of John's ascetic appearance that marked him as a wilderness prophet calling Israel to repentance. The multilingual evidence (Spanish 'de cuero,' French 'de cuir,' German 'ledern') uniformly identifies this as a material descriptor, emphasizing the rustic, non-luxurious nature of prophetic dress.