25 mm poplar plywood base structure with internal uprights also made of poplar plywood. Inside and outside honeycombed in 4-mm poplar plywood. Seat in 25-mm poplar plywood in full panel with perforations for ventilation. Seat padding of polyurethane foam in various densities: lower central part in density 35 Fe load-bearing, upper part and rounded edges in density 35 Fe elastic and outer and perimeter band in 30 FE rigid. Lower seat perimeter in load-bearing polyurethane density 30 grf. The upper part of the seat is covered with 3 cm memory foam and acrylic flap grams 200. Seat cover not removable. Back flying cushions filled with a mixture of acrylic and down (fiderfil acrylic), product cover removable. Steel feet. 20 plywood base with laminate perimeter edging.