An exclusive layer of feel-enhancing material complements the 1,300 double-stacked innerspring coils for high responsiveness and exceptional support, perfect for sleepers of all shapes and sizes.A. Pure Cool® Plus Material - 5cmAn enhanced version of our exclusive and innovative cooling material, designed to pull heat away from your bodyB. Ventilated Advanced Relief™ Material - 6cmOne-of-kind pressure-relieving material, enhanced with added ventilation for increased airflow—for deeper, more restful sleep