Method of producing an automotive cushioned supporting body and supporting body produced using such a method

An automotive cushioned supporting body (4) is produced by forming a reinforcing structure (9), and embedding the reinforcing structure (9) in foam material; the reinforcing structure (9) being produced by forming a peripheral rigid frame (10), and fitting directly onto the rigid frame (10) a bag body (13) or sleeve body (18) made from folded sheet material, e.g. metal mesh.