separated spring (pocket spring)are a new invention that is very interesting it is used to increase the health and prevention of pain in the back of the waist the detachable spring in the mattress are briefly made of steel and individually inside the envelope ,and the shaking of it does not relate to the rest of the springs.
if in normal mattresses ,the spring are connected to one another and the part of the mattress every where the mattress shakes, this stiation increases when the weight of the two halves increases and makes it difficult for the other side to sleep
therefore . the inertial spring was invented to solve this problem . as well as because it is located in the mats in the unpowered mats where the body to be in a standard position and to the column do not stain the spine