Abstract: A seat and backrest combination device formed of contoured, rigid panels which are retained within a slipcover formed of a specially shaped stretchable cloth material. The slipcover is shaped in a "saddlebag" design, having a pair of pockets each of which has a front and rear face, the front faces of the two pockets being joined by a single strip extending for substantially the entire width of the slipcover. The slipcover thus provides a flexible member which allows for interplay between the seat panel rear edge and the back panel lower edge. By appropriate adjustment, the user is provided with a maximum degree of seating comfort, while the benefits of the orthopedic design are not sacrificed. For example, the back panel lower edge may be placed upon or behind the seat panel rear edge, and this is made possible by the stretchable fabric material used to construct the slipcover.