A helmet mounted safety device comprises right and left mandible engaging sections. Each of the mandible engaging sections comprises an adjustable airway opening member for assuring opening of the airway and is connected whether integrally or detachably to a side portion within an interior of a helmet in order to facilitate engagement with the mandible of a wearer of the helmet upon demand. A helmet comprising the right and left mandible engaging sections is also taught and further comprises in one embodiment a neck stabilizing cervical support that includes an occipital portion and two sternocleidomastoid (SCM) portions between which the occipital portion is interposed for engaging the SCM muscle at the side of the neck.
