In firmer mattresses there may be up to 3500 springs (firm mattresses generally contain less than three thousand springs. Three thousand springs and above are only found in very firm orthopedic mattresses). Furthermore, in a normal open coil spring system the springs are interwoven, so that pressure applied to the spring at one end of the mattress can have an impact on the springs at the other end of the mattress, leading to roll-together and the sensation of being rebounded out of the bed every time your other half moves.
To make the maximum use of pocket spring technology, most mattress makers have developed a total range of mattress covers. The most recent pocket spring covers provides unprecedented comfort through individual springs that follow the natural contour of the body providing perfect orthopedic support. The pocket spring system offers complete autonomy from each other, helping to reduce partner turmoil and roll-together.
Sealy Posturepedic King Mattress
Unlike standard spring systems, where springs are hooked up to one another by wire, the new pocket springs have complete autonomy from each other, giving more freedom, less roll-together and reducing partner distraction. Each time you move, the pocket springs right away respond and move with you. Each spring is free to retort to individual pressure regarding the weight placed on it, leading to support in contouring the body shape.
Independent tests prove that the new pocket spring mattresses create less strain on the body than a traditional innerspring mattress. Pocket springs comply with the body's shape helping to maintain natural spinal alignment and distribute body pressure. Moreover, zoned support divides the mattress in to sections giving different support levels in selected areas to provide natural spinal alignment and additional lumbar support where you want it most.
The other more common types of mattresses are memory foam and latex. Unlike standard foams that compress, memory material deforms in shape under stress and does not want to spring back to its original shape immediately. The chemistry of the foam permits the cells to spread the air pressure from one to another when you lie on the mattress, making memory material fantastically effective at reducing the impact of the body's natural pressure points.
You should definitely go into the store to test out a new pocket spring mattress and while you're at it, to test out a memory foam one as well. See which one feels more comfortable to you. That's the only way to know.