This Small Double size Pocket Sprung Mattress works by each individual spring unit being enveloped in its own fabric casing.Each spring acts independently of the other springs, giving each sleeper their own level of support. Layered fillings surround this sprung system. The mattress is carefully upholstered, using hand tufting to secure the layers of selected fillings. It also features layers of non-allergenic fillings which may help in the relief of many ailments such as, asthma, sneezing, coughing and wheezing. This is the Small Double size 1220mm (4\") width mattress other widths are also available in this section of the website. All of the Pocket Sprung Mattresses have a length of 2000mm (79\") and a height of 200mm (8\"). Available in mainland UK only.