Starting with a rock-solid, 7 inch base of high density, high resiliency CertiPUR Certified foam, layered with 2 inches of Serene Comfort Foam and 1 inch of Serene Comfort Foam with Active Air Hole Punch Technology. What does this all mean? It means that this mattress will out perform regular memory foams and temper foams by keeping you cooler and dryer, offer better pressure relief while having a fast recovery, unlike temper foams which get softer because they hold onto your body heat. With the four-way stretch knit fabric, it will give each sleeper individualized, stable support and comfort.