But good head restraint geometry by itself isn't sufficient. A seat has to be designed so it doesn't move backward and away from the head during a rear impact. A seat also needs to 'give' so an occupant will sink into it, moving the head closer to the restraint.  -   Adrian Lund     Quotes
But good head restraint geometry by itself isn't sufficient. A seat has to be designed so it doesn't move backward and away from the head during a rear impact. A seat also needs to 'give' so an occupant will sink into it, moving the head closer to the restraint. Adrian Lund