Pocket Sprung Sets
A pocket sprung 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.
Open Coil Sets
Open coil means that there are usually only around 360 springs (for a double mattress). Each of the springs is linked together within a wire frame. These are the traditional type of springs that are usually cheaper than pocket sprung.