Mandible guard

A helmet assembly comprising:

• a helmet;
• a mandible guard having a mouth covering portion;
• a first attachment arm arranged to removably secure a first side of the mandible guard to the helmet, the first attachment arm being removably attachable to the helmet, the first attachment arm extending from a first helmet connection region to a first mandible guard connection region;
• and
• a second attachment arm arranged to removably secure a second side of the mandible guard to the helmet, the second attachment arm being removably attachable to the helmet, the second attachment arm extending from a second helmet connection region to a second mandible guard connection region;
• wherein, when the mandible guard is secured to the helmet with the first and second attachment arms:
• the mouth covering portion maintains a protection position in which the mouth covering portion is aligned with a midline of the helmet;
• and
• movement of the mandible guard in a direction from a front of the helmet to a back of the helmet is prevented by the first and second attachment arms;
• wherein, when the second attachment arm is detached from the helmet and the first attachment arm remains secured to the helmet, the mandible guard is movable out of the protection position;
• wherein the mandible guard is connected to the first attachment arm via a hinge connector having a first axis of rotation about which the mandible guard rotates relative to the first attachment arm;
• and
• wherein the hinge connector includes a second axis of rotation about which the mandible guard rotates relative to the first attachment arm.