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 - 5cm An enhanced version of our exclusive and innovative cooling material, designed to pull heat away from your body B. Ventilated Advanced Relief™ Material - 6cm One-of-kind pressure-relieving material, enhanced with added ventilation for increased airflow—for deeper, more restful sleep

*About Split Cal King: Each split California king mattress is comparable in size to a twin, and two are required to create a complete set—making it easy to mix and match comfort levels for personalized sleep.