80) With the Border, Cover and the Seat selected, enter in the Isolation Mode.
81) Select the Seat and apply an Editable Mesh modifier on it. Enter in the Polygon subobject, select these polygons and delete them. You problaby going to do this if you want to delete unecessary polygons or the botton of the Seat is overtaking the Cover boundary.
82) Great, now we are going to apply a FFD 4x4x4 modifier on the Seat to make some curvers.
83) Final curves:
84) Last step is change some colors and it's done for now.