After having been admitted to the seminary of the sylph Astral Templar, initiates undergo a procedure that places a small valve just above the sternum, allowing for proper respiratory interface with Templar armour.

These heavy moonstone suits, in addition to protecting a Templar in combat, provide respiratory aid, quickly removing ash breathed by the wearer via a large, rear-mounted filtration device which is threaded through the sternal valve. So long as a Templar remains within the suit, he or she can effectively breathe indefinitely, even in the most ash-heavy environments.