A pocket spring mattress contains individual springs, each sewn into its own pocket of fabric. This provides much more support and comfort than an open coil mattress, where each spring is lined together within a wire frame. Springs within a open coil mattress move as one unit, so if you move around in the night, you are more likely to disturb your partner. By contrast, the springs in a pocket sprung mattress work completely independently of one another, making this type of mattress the perfect choice if you and your partner are different weights as well as ensuring you maintain correct posture throughout the night. Pocket sprung mattresses also tend to have much higher spring counts than open coil mattresses, thus offering greater support and contouring to your body more effectively.