Sleep Like Royalty! 👑 Conforms to your body’s unique contours for personalized support. ThermaGel technology ensures a refreshing sleep surface. Experience the ultimate comfort with 3 inches of plush memory foam. Quality craftsmanship you can trust. Enhances your existing mattress for long-lasting comfort. Cooling Gel Infusion 100% Memory Foam Made in the USA The Serta ThermaGel Cooling Memory Foam Mattress Topper is a 3-inch thick, full-sized topper designed to enhance your sleep experience. Infused with cooling gel, it provides a breathable and pressure-relieving surface that adapts to your body, ensuring a comfortable night's sleep. Proudly made in the USA, this topper not only improves your mattress but also extends its lifespan.