Sofa bed with completely removable covers Frame construction with hardwood, plywood and high-density particleboard Electro-welded bedspring with elastic belts on the seats and back cushion support included Mattress h 17 cm in Polyurethane foam 30 Kg/MC Back padding in Polyurethane foam - density 18 Kg/ MC upholstered in resin fiber and velveteen Gr 100/ sq. m. Seat padding in Polyurethane foam - density 30 Kg/ MC upholstered in resin fiber gr 200/ sq. m.