A vehicular cargo retention system includes a first cargo retention rail pivotally coupled with a load floor. A second cargo retention rail is pivotally coupled with the load floor. The first cargo retention rail is configured to rotate to a position above the second cargo retention rail. First and second shelves are operably coupled to a vehicle seatback. The first and second shelves are operable between a stowed position, wherein each of the first and second shelves is generally coplanar with the seatback, and a deployed position, wherein the first and second shelves extend generally horizontally.