The 2 seat version of Florence Knoll's eponymous 1954 sofa design has been updated for increased comfort. Seat suspension with variable density foam. Seat and back cushions with variable density foam welted and covered with polyester fiberfills to enhance comfort. Seat and back cushions are also available untufted or 'quilted' with buttons for the version in leather and without buttons for the upholstered version with fabrics.