The Kanohi Kaukau was the Mask of Water Breathing. It allowed its user to breathe underwater for an extended period of time.1
Notes
The Kaukau was the Great Mask of Water [Breathing]. It allowed the user to breathe underwater.2
The Kanohi Kaukau was the Great Mask of Water Breathing. It allowed its user to breathe underwater.3
Kaukau were created from Kanoka disks with the regeneration, shrink, and removes poison powers.4
The Kaukau must be consciously activated.5