This is a complete and innovative springs system, with a load-bearing base, that could be made with 800 springs pocket, 1600 springs pocket and 3000 springs one. On that base is built a Pyramid consisting of one or more layers of Cover and Cover HD, in order to guarantee the highest level of mattress flexibility. This kind of structure, that is highly elastic, permits to the human body to be nicely “embraced” leading the natural movements during the sleep, working with the correct mix between flexibility and firmness. This is the ideal solution to be put in the BOX SYSTEM, that will be completed with Polyurethane and/or visco-elastic sheets, in the classical or in the “No Flip” version.