The frame is made of domestic, well-seasoned and knot-free softwood plus birch plywood and fiberboard. Seat and inside arms are covered with natural leather or fabric. Outside arms, front panel and inside back are covered with imitation leather or fabric. Zigzag springs. Seat cushions and back pillows are filled with high resiliency polyurethane foam core and polyester ball fibre. The finished back, so that the sofa can be placed in the middle of the room. Folding versions include mattress. Colour of the legs is optional.