The latest generation of independent springs available in ZONATO version with 3-5-7 zone differentiated bearing capacity and MONOZONA. The very high density of springs per square meter, more than 1000, made through a high-carbon wire and compounds in wire diameter of mm. 0.80-0.90-1.00, together with the 13 coils in the single and the hypoallergenic fabric, make this spring system unique.