The load-bearing frame is made of poplar heartwood with some connecting elements of poplar plywood; the wood is naturally seasoned for at least three years in stacks on the company’s premises. Dap joints unite the various parts of the frame with securing cylindrical dowels. The seat webbing consists of elastic polypropylene and natural latex belts in two sizes and with different elasticity. Belts 9 cm wide—with 20%elasticity—are fixed parallel to each other and perpendicularly to the length of Bridge; these are interlaced by 5 cm wide belts with 80% elasticity. The framework is upholstered with contoured sheets of resilient CFC-free, polyurethane foam (density between 40 and 50 kg/m³), covered with bonded plush and polyester wadding. The seat cushion is made with polyurethane foam at a density of 30kg/m³. The movableback cushion is filled with Tecnolat, a mixture of 100% silicon-coated hollow staple polyester and natural latex foam cut into small lozenge-shaped pieces. This innovative material provides the same softness as feathers, with the additional advantage of a “memory” effect—after pressure has been exerted on the cushion it automatically returns to its initial shape without having to plump it up manually. Thearmrest cushions are 100% feather filled. The drawn steel supports, kiln enameled with epoxy powder paint, have leather strips on the bottom to prevent floor abrasion.