Side Wall Assembly for Use in a Pickup Truck Bed

At least one and, preferably, a pair of generally parallel side wall assemblies for use in a pick-up truck bed are provided. Each of the assemblies includes a vertically extending side wall having an upper surface and a set of linearly spaced pockets extending from the upper surface and into the side wall. Each of the pockets receives and retains a stake in a stowed position within the side wall wherein the bed has a first storage capacity. Each of the pockets allows its stake to move therein to an extended position above the upper surface wherein the bed has a second storage capacity greater than the first storage capacity in the extended positions of the stakes.