“WHICH END IS UP?” surpasses “Which corner of the room?” when it comes to Series X, a collection whose multi-functional pieces can be rotated for different uses. Don’t like the coffee table? Flip it 90 degrees and get a taller hallway table. Need a stool to match? Turn the upright sofa on end. Series X is made from birch-veneered plywood and fully weather-proofed for both indoor and outdoor enjoyment.