Serta’s Perfect Sleeper Pacific Peace 12" Hybrid Firm Mattress is perfection indeed! A combination of a 3 zoned coil design, that has pressure relief and support where you need it most. Its integral part is a Cool Twist® Gel Memory Foam that contours to your body's shape. It’s absolutely perfect that it came in the Summertime season to help combat the heat. I know that it will also be perfect year round as well. We totally love our new mattress. It’s firm luxury at its finest!