The central core of Silver mattress is made of inter-connected springs with a small opening diameter. The small diameter results in tolerance of heavy weights and long life of the mattress. The wire used in this model is high-carbon and its thickness is 2.2 mm. The number of springs is 299 in size 90, 414 in size 120, 552 in size 160 and 621 in size 180. This set of springs is fastened by a frame made of 4-mm wire. A sponge with the density of 25 kg/m³ strengthens the walls of the mattress to create more consistency and integration in its structure. Since this mattress is padded on both sides, both sides can be used with a similar feeling. Pads provide greater comfort during sleep. The cloth used in this mattress is circular knit which prevents from sweat. The height of this mattress is 31 cm (+2).