A vehicle having a seat and an airbag assembly, the airbag assembly comprising: a housing mounted in an inboard portion of the seat; an inflator assembly at least partially disposed within the housing; and an airbag in a packaged state within the housing, the airbag configured to receive inflation gas to expand and deploy from the housing to a deployed state, wherein the airbag in the deployed state comprises a first inflatable chamber having a longitudinal axis and extending in a longitudinal direction of the vehicle; and characterized in that the airbag in the deployed state comprises: a second inflatable chamber disposed on an inboard side of the first chamber and oriented at a first angle (θ1) to said longitudinal axis of the first chamber such that the second chamber extends away from the first chamber in a direction transverse to the longitudinal axis of the first chamber; and a third inflatable chamber disposed on an inboard side of the first chamber and oriented at a second angle (θ2) to said longitudinal axis of the first chamber such that the third chamber extends away from the first chamber in a direction transverse to the longitudinal axis of the first chamber and transverse to the second chamber, wherein the first angle (θ1) is different from the second angle (θ2). a housing mounted in an inboard portion of the seat; an inflator assembly at least partially disposed within the housing; and an airbag in a packaged state within the housing, the airbag configured to receive inflation gas to expand and deploy from the housing to a deployed state, wherein the airbag in the deployed state comprises a first inflatable chamber having a longitudinal axis and extending in a longitudinal direction of the vehicle; and characterized in that the airbag in the deployed state comprises: a second inflatable chamber disposed on an inboard side of the first chamber and oriented at a first angle (θ1) to said longitudinal axis of the first chamber such that the second chamber extends away from the first chamber in a direction transverse to the longitudinal axis of the first chamber; and a third inflatable chamber disposed on an inboard side of the first chamber and oriented at a second angle (θ2) to said longitudinal axis of the first chamber such that the third chamber extends away from the first chamber in a direction transverse to the longitudinal axis of the first chamber and transverse to the second chamber, wherein the first angle (θ1) is different from the second angle (θ2). a second inflatable chamber disposed on an inboard side of the first chamber and oriented at a first angle (θ1) to said longitudinal axis of the first chamber such that the second chamber extends away from the first chamber in a direction transverse to the longitudinal axis of the first chamber; and a third inflatable chamber disposed on an inboard side of the first chamber and oriented at a second angle (θ2) to said longitudinal axis of the first chamber such that the third chamber extends away from the first chamber in a direction transverse to the longitudinal axis of the first chamber and transverse to the second chamber, wherein the first angle (θ1) is different from the second angle (θ2).