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. The springs in a pocket spring 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 spring mattresses also tend to have much higher spring counts than open coil mattresses, thus offering greater support and contouring to your body more effectively.