High density pocket springs with 3-5-7 different zones. This system can be defined as the evolution of the traditional pocket spring, with a higher flexibility. The 500 springs per square meter manufactured with high standard carbon with diameters mm 1.20-1.30-1.40 guarantee a long-lasting independence and a non-deformable support. Positioning of this product is the one of the high-end, technological products. Its strength point is the high independence in the body support and in the structural flexibility. These technical-mechanical characteristics make this product ideal for beds bases with independent movement. Two versions are available: the “soft” one, with 1.2/1.3 mm diam. and felt covering and the “firm” one with 1.3/1.4 mm with spunbond covering.