The invention describes a vehicle occupant restraint system (10) comprising at least one vehicle seat (12) and at least one inflatable airbag (14) associated with the vehicle seat (12), wherein the airbag (14) is mounted above the associated vehicle seat (12), and wherein the airbag (14) when inflated has a base body (16) whose envelope is wedge-shaped in the vertical direction and which, when inflated, overlaps at least to a certain extent with the vehicle seat (12) in the vertical direction.

The invention relates to an airbag, preferably an OPW airbag, which is configured to be set from an uninflated state to an inflated state by an inflation operation to protect an occupant of a vehicle. According to the invention, it is provided that the airbag has at least two fabric layers which are connected to one another in such a way that a plurality of airbag chambers are formed, wherein in the inflated state the airbag chambers are each formed as tubular chambers, which extend and/or are arranged transversely and/or obliquely and/or parallel to a depth direction of the airbag in the inflated state in such a way that the outer shape of the airbag assumes the shape of a tube, in particular a tube with an oval or elliptical cross-section or a hollow cylinder with a circular cross-section.

The invention relates to an airbag which is configured to be set from an uninflated state into an inflated state by an inflation operation to protect an occupant of a vehicle, the airbag comprising at least two fabric layers which are connected to one another in such a way that at least a first airbag chamber and a second airbag chamber being separate from the first airbag chamber are formed. According to the invention, it is further provided that the fabric layers are connected to one another so that the first airbag chamber and the second airbag chamber can be set independently of each other from the uninflated state thereof into the inflated state thereof, respectively, and the first airbag chamber, starting from uninflated state thereof, curves outwardly during a first inflation operation of the first airbag chamber and/or forms a tubular shape with an oval or circular cross-section at least in portions in the inflated state of the first airbag chamber, and thereby an overlapping portion, preferably an outer overlapping portion, of the second airbag chamber in the uninflated state thereof or in the inflated state thereof overlaps, preferably radially overlaps, an overlapping portion, preferably an inner overlapping portion, of the first airbag chamber.