The sealy pearl luxury posturepedic mattress combines an ultra supportive posturetech 620 response spring system with a sumptuous pillowtop layer to offer a divine sleeping surface the spring unit used in the mattress works to correctly align your spine whilst you sleep helping with posture and neck and back pains this technology also eliminates tossing and turning during the night and this significantly improves the overall quality of your sleepa number of eco friendly tencel fibres work to