POCKET SPRUNG
Unlike other spring units the pocket spring system spreads the sleeper weights accross the surface. Pocket springs are individually wrapped coils, which sit within their own fabric pocket. The springs themselves are not linked together; meaning each spring is able to move independently. This provides enhanced support by adjusting to the contours of your body. Further support is given by the insulating material which surrounds these springs and what's more, this also prevents 'roll together' if you sleep with a partner. One of the biggest advantage to pocket springs, as you get in or out of bed or turn while you sleep there is no motion disturbances which mean your partner can sleep soundly.
More pockets does necessarily mean its better or you are getting more for your money.