Integrated closeout flap for reclining rear seat assemblies

A rear seat assembly for use in an automotive vehicle having a package shelf, said rear seat assembly comprising:

• a seat back pivotally coupled to the rear seat assembly for movement between a plurality of seating positions, said seat back having a rear surface spaced apart from the package shelf to define a gap therebetween;
• and
• a flap made from a single piece of molded plastic fixedly secured to said rear surface of said seat back, said flap having:
• a front wall adapted to be fixedly secured to said rear surface of said seat back, said front wall having an upper edge;
• an upper wall extending outwardly from said upper edge of said front wall and slidable under the package shelf when the seat back is moved between the plurality of seating positions for substantially concealing said gap by being located underneath the package shelf while said seat back is in any one of the plurality of seating positions.