Abstract: A seat frame having a base portion and an upwardly extending back portion in a generally L-shaped configuration and a downwardly extending leg portion, the base portion having forwardly extending vertical edges at the exterior edges of the seat and at a central vertical divider to divide the seat into a first side and a second side. A seat cushion and a back cushion positionable upon the base and back portions of the frame of each of the sides, a strap arrangement having shoulder straps extending downwardly from an upper extent of the back portion with a rigid locking tongue at the lower extent thereof removably positionable in a locking element in the forward extent of the seat frame.