The sealy casoli 1200 pocket mattress uses a number of features to help correctly support and align the spine in its natural shape the 1200 individually pocketed springs sealed and held together by a patented unicase design for extra longevity all work independently from each other to mould to your body shape and evenly distribute your body weighta deep layer of innergenic latex foam provides additional pushback support and eco friendly tencel and sealy smart fibres help to keep you cool th