It has 450 independent springs individually coated with TNT (900 springs in double sizes). It can thermoregulate thanks to both the open-cell structure of the memory foam and the springs that favour the passage of air. It is covered with hypoallergenic, antibacterial, and anti-mite material, hypoallergenic padding, and breathable 3D tape. Perimeter box in polyurethane foam. It is modeled both by body heat and by the pressure exerted. The number of springs indicated refers to the standard size. It has the "CE" marking and the materials are certified. Completely made in Italy.