Serta 14-inch Gel-Memory Foam Mattress, King Extra-thick 14-inch gel-memory foam mattress with premium 4-layer construction Serta utilizes the latest in memory technology to provide you with the ultimate sleeping experience. Evenly distributes weight to relieve painful pressure points Gel-memory foam and ActivAir foam promote enhanced airflow and breathability for the optimal sleep temperature Promotes proper spinal alignment and reduces tossing and turning. Spot clean only.