This Medium innerspring mattress lays the foundation for a great 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 three layers of memory foam on the top contours to the shape of your body. Underneath, an innerspring coil system alleviates pressure points and prevents tossing and turning. This mattress can hold up to 500 lbs. Offering the best of both worlds, this hybrid mattress combines conforming high-density foam and pocket spring coils to cradle your body in every position, reducing motion transfer and relieving pressure points for a full, undisturbed sleep. You'll wake up each morning feeling refreshed and ready to take on the day. It's compatible with trundle beds, platform beds, and adjustable bed frames. The CertiPUR-US Certified foam is free from harmful substances to ensure a safe sleep environment, allowing you to rest peacefully and relax knowing the quality of your indoor air won't be compromised. Your mattress in the box ships compressed, rolled, and boxed, making it easy to transport and fit neatly into most bedframes.