The Dynasty Plush Cal King Mattress is loaded with superior, cool support. Phase change technology, active air memory foam, and cool gel 5-zone quilting foam remove surface heat and increase airflow for a refreshing feel and a cooler, deeper sleep. Individually wrapped coils keep the motion centralized with higher-gauge steel in the middle, providing increased support and durability. Its SuperEdge Plus foam encasement and 13" profile create a comfortable sleep surface, right down to the edge.