The Hob tradition is an ethno-socio-religious group of cultures that have existed since the 10th AGE. The main outward practice for which the tribes are known is their intense fear of the gods and their equally intense belief that hiding their faces protects them somehow from the same.
Different subsets perform this taboo in different ways.
The Goblin Tribes, the most primitive (and therefore most orthodox), hide their faces completely with masks
The Barghest, much larger and stronger than the inbred Goblin tribes, trust in amulets, piercings, and runes.
The Hob (singular and plural) tend towards a more organized style to match their militaristic culture.