Hau

Hau is the Kanohi mask of Shielding. It can give the user the ability to protect himself from any seen attack, but it is useless against ambush or an unexpected attack. The Hau Nuva is a more powerful version of the Hau, and could project a stronger force field than a Hau. It also allowed the user to project this shield for a longer duration of time. The Hau Nuva, like all Kanohi Nuva, allows the wearer to share its power with those nearby. The Hau is one of the symbols of the Great Spirit Mata Nui.

Gali, Onua, Pohatu, Kopaka and Lewa all found great Hau masks but lost them when they became Toa Nuva. They then gathered a Hau Nuva each.

Kanoka Disks made from

 * Growth
 * Regenaration

Nuva
it can possibly be made from the great Ta-Metru disk

Known Wearers of the Hau

 * Tahu - (great, lost upon becoming a Toa Nuva, when he recieved a Hau Nuva)
 * Lhikan - (great and noble, lost upon death)
 * Pekka - (great but powerless)
 * Zemya - (great but powerless)
 * Kumo - (great but powerless)
 * Marka - (great but powerless)
 * Lumi - (great but powerless)
 * Jaller - (noble, recieved from Lhikan after his death, lost upon arriving in Karzahni, where he recieved a Calix)

Known Wearers of the Hau Nuva

 * Tahu Nuva - (great, transformed by energised protodermis from his Hau upon defeating the Bahrag sisters.