An occupant support includes a seat frame, a seat cushion unit, and an airbag system. The airbag system includes an airbag unit coupled to the seat frame and an airbag chute coupled to the seat cushion unit. The airbag chute encloses the airbag unit and retains the airbag unit to the seat frame. The airbag chute includes a first chute flap, a second chute flap, and a zipper coupling distal ends of the first and second chute together in an installed position.