Enjoy top-notch, luxury sleep night after night with the Beltrami Firm Cal King Mattress. Its foam-encased 1000 series 3-zone coil unit and Duralast support foam are highly responsive, compressing and expanding through the night for nonstop comfort. Stocked with the patented Marvelous Middle technology, it offers 25% more lumbar support in the center third and resists sagging to prolong the life of your mattress. The equipped cooling technology pulls the heat away from you, so you'll fall asleep faster and stay asleep longer.