Plastics Sofa With Armrest by Kartell. Plastics is a system of modular seating with simple and linear elements that can stand alone or in different combinations, creating innumerable possibilities. The transparent polycarbonate base and the use of rubberised technical fabrics combine aesthetic innovation and functionality and make Plastics youthful and trendy, elegant and refined. Plastics is formed by four base elements which offer maximum freedom: Pouf - a cushion in soft polyurethane. The minimal lines of the pouf are enhanced by the four transparent polycarbonate feet. Armchair uses the same materials and finishes and is produced in three different models: seat with backrest, right armrest or left armrest. Just as for the pouf, the supporting base is composed of four feet made of transparent polycarbonate. Plastics Sofa With Armrest by Kartell is designed by Piero Lissoni.