PlushBeds 12" Cool Bliss Gel Memory Foam Mattress - Cal King, California King Medium-soft firmness Luxurious stretch cover with cooling enhancements 3 inches of 4 lb soft Gel memory foam, 2 inches of medium 100 percent natural Latex, 2 inches of convoluted 2.5 lb HD high density support foam, and 5 inches of 2.5 lb HD high density support foam No off-gassing or harsh odors Next generation memory foam - 30% cooler than traditional memory foam mattresses