Minecraft wiki entry for Armor, associated text: All other mobs can be equipped via commands, although the armor cannot be seen. Helmets can protect mobs from burning in sunlight, depleting its durability as it absorbs the damage. Eventually, the helmet loses all of its durability and breaks. Pumpkins and mob heads also protect mobs from burning in sunlight. Damage caused by any other source does not cause the mob's armor durability to decrease.