This 8" medium memory foam mattress lays the foundation for a good night's sleep. It's crafted from polyester in a white hue with a wide variety of sizes to choose from. Its rectangular silhouette features a tight top that provides proper edge support, making sure your sheets stay in place. The layers of high-density quilting foam and padding contour to the shape of your body. This mattress arrives compressed inside a box, so we recommend giving it time to expand to its size. Best of all, it's backed by a 5-year manufacturer's warranty.