COMPOSITION AND MATERIALS STRUCTURE: fir wood, plywood and wood agglomerate covered with polyurethane foam. SPRING SYSTEM : elastic strap. SEAT CUSHION PADDING : Made of environmentally friendly polyurethane foam, covered in 100% polyester padding. SHOULDER CUSHIONS PADDING : Made of environmentally friendly polyurethane foam, covered in 100% polyester padding. ARMREST PADDING: Goose down. REMOVABILITY: Available only in the "fabric" version. Removable seat, back and armrest cushions SEAMS: Leather upholstery can be made with contrasting thread in the available color variants, also provides different cuts than the microfiber or fabric upholstery. Standard feet: Metal h 17 cm. available in colors: dark titanium, polished steel NOTE: 3-ROOM and 2-ROOM MAXI versions are supplied with structural center foot. UPHOLSTERY: Leather - fabric - faux leather