Abstract: A furniture assembly adapted to support a human in a seated position, including a novel core sub-assembly, wherein the novel core sub-assembly comprises a seat member, a base member, a left side, a right side, a front side, a back side, an optional back support member, an optional left arm, and an optional right arm, wherein the novel core sub-assembly preferably comprises polystyrene and is optionally associated with a polyurea coating and/or a slipcover.