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The Benefits of a Pocket Spring Double Mattress A pocket sprung mattress is made up of springs that are individually wrapped in a mattress and are adjusted to the shape of your body for precise support. They also limit the amount of motion transfer between bedmates. The number of springs - from 1000 to 2000 per kingsize - isn't as important, as the spring tension and the natural fillings that house them. Comfort A pocket sprung mattress uses hundreds or even thousands of tiny springs which are wrapped in pockets of fabric. This allows each spr