An airbag assembly includes an airbag and a panel. The panel extends from a first apex to a second apex each spaced from the airbag. The panel includes a depressed region between the first apex and the second apex. The depressed region is attached to the airbag. During a vehicle impact, the momentum of the occupant may move the occupant toward the depressed region of the panel. The airbag may absorb energy from the occupant, and the apexes encourage the occupant to be retained in the depressed region.