The Hau Nuva was the Kanohi Nuva Mask of Shielding, formed when a destined KanohiHau was exposed to Energized Protodermis and transformed. The Hau Nuva gave its user and those nearby the power to shield themselves from physical harm, as long as the user(s) was aware of all attacks made at them. In the event of a mental attack, however, the Hau Nuva was useless. Additionally, attacks such as molecular disruption could disrupt the shield. The only beings able to activate this mask's power were Toa Nuva.