The sleep technology of the 14.5’’ Serta Arctic Premier plush hybrid mattress is unparalleled and for good reason. It features the exclusive Reactex® System, which has 15x better cooling power and was designed to be the most heat-absorbing layer from Serta. Four additional layers of memory foam offer custom comfort and reactive contouring. They cushion and conform to your body, making it the most reliably supportive mattress of the all. Bring home the coolest, most comfortable sleep you deserve.