The present invention relates to a device that stabilizes and/or protects the head and spine from injuries. An immobilization device includes one or more pillars with multiple segments that protect the head and spine of a user. The pillars typically run along the part of the head and spine and pelvis that the device protects. A wire or cable runs through these segments in the pillars. By design, when the pillars of the invented system are not activated and the system is in normal use, the pillars are designed to be as flexible as possible and allow full physiologic motion of the protected body part. Activation of the system confers rigidity to the system and prevents or lessens harmful, non-physiologic motion of the body part intended to be protected.