... Italian top grain leather available + PVC 3) full of High quality italina leather 4) Chinese leather+PVC5) full of Chinese leather6 ... insulation,heat insulation,shock absorption,flame retardant,antistatic,breathable,high spring back properties,widly used to make mattresses,sofas,cushions ... and other furniture.3) Spring:Metal S-shaped springs4)Band: the rubber band 10 ...