Abstract: An airbag system for restraining an occupant of a vehicle during a vehicle impact comprises at least a first airbag and a second airbag, each of the first and second airbags being inflatable upon deployment and comprising a mounting means for mounting the first and second airbags in an occupant compartment of the vehicle; a restraint surface arranged to contact and restrain at least a region of a vehicle occupant in the event of a vehicle impact; and an airbag reaction surface, wherein the airbag reaction surface of the first airbag is arranged, during airbag deployment, to react against the airbag reaction surface of the second airbag so that the first and second airbags provide mutual airbag support for one another through the airbag reaction surfaces.