The Bio Mask is one of the main tools used by the Predators. These masks contain a variety of functions which the Predators may require during a hunt. As well as protecting the Predator's head, the mask has a sound amplifier, multiple vision modes, a zoom function, some diagnostic capabilities and a recording system. The mask may also have a red targeting laser, used by a Predator for accurate plasma caster shots. It also might be used as a breathing tool.