The diameter of the spring increases progressively, from segment 1 to 2, while the coils move away from each other to offer a precise and reliable response to every pressure, which means that you have a pleasant sense of accommodation while you are also getting the right support.
In segment 3 of the spring, the diameter reduces again, while the coils are closer together, creating the solidity of safe and resistant support without excessive rigidity.
The spring has a wider diameter (segment 4) and the distance of the coils increases, and then it diminishes again (segment 5), while the coils are closer. You will enjoy pleasant accommodation and adaptive comfort on both sides of the mattress.