... anti-solvent, anti-chemicals as well as acid-alkali resistance,easy for maintenance ,thickness from 0.8mm to 1.5mmleather options ... uniform texture,polishing is excellent,smooth surface,Role long shelf life,strength,durability.not curly,beautiful with age..The main wood ... properties,widly used to make mattresses,sofas,cushions and other furniture.3) Spring:Metal S-shaped springs4)Band: the rubber band ...