The proselyte hauberk is a piece of Temple Knight Armour that requires 30 Defence, 20 Prayer, and completion of The Slug Menace quest to equip. It has the highest Prayer bonus of any body slot equipment. It has similar bonuses to those of an Adamant platebody with a +8 Prayer bonus. Oddly enough, it does not stop Ava's devices from gathering arrows.
Like other Proselyte equipment, it is white with a dark-gold trim.