12-inch hybrid mattress with a cooling cover that blends individually encased pocket coils with memory foam for a medium feel. Plush CoolSync foam contours to the body, while gel infusion and a HyperChill cover help keep sleep cooler. A supportive base foam layer works with adjustable bases, and the CertiPUR-US certified foam arrives compressed, rolled and boxed. Covered by a 10-year warranty.