Open coil (also known as Miracoil, Continuous coil, Standard coil e.t.c) are the most common types of mattresses, which consist of a inter-connected spring system. They are the traditional manufacturing method for mattresses, capable of being mass-produced with a low production cost – this makes them one of the cheapest on the market. A standard double open coil mattress will contain an average of 300 springs.
Pocket sprung mattresses offer more support than open coiled. The individual springs that make up the mattress are housed in their own little pockets and work independently of each other. Spring counts can vary dramatically from 600 to 5,000. Typically, the higher the spring count, the better the support.