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The Benefits of a Pocket Spring Double Mattress A pocket sprung mattress is made up of springs that are individually enclosed and shaped to the shape of your body for a perfect fit. They also limit motion transfer when sharing the bed. The number of springs (from 1000 to 2000 per Kingsize) is not as important as the tension of springs and natural fillings. Comfort A pocket sprung mattress uses hundreds or even thousands of tiny springs which are wrapped in pockets of fabric. Each spring