Gel Memory Foam Material: Our memory foam mattress topper readily conforms to the curves and shape of your body, distributes weight evenly to alleviate pressure points for better sleep. Increase Softness and Comfort: The mattress topper not only protects your mattress and other bedding, but also extends the life of the product itself due to its high-density topper and soft cover. Non-slip & Machine Washable cover: Use skin-friendly and breathable Polyester fiber, with elastic straps and anti-slip surface backing to prevent sliding and premium metal zipper for easy removal and washing. Certification: Our Gel memory foam topper is made of CertiPUR-US certified materials and soft cover is certificated OEKO-TEX. The memory foam topper meets or exceeds standards for content, emissions, and durability. Note: Leave the memory foam flatly in a well ventilated area for 48-72 hours until it’s fully expanded. Tips: Low temperature may need more time, find a suitable temperature(78℉) will shorten the time. Important: This product is intended to be used on top of an existing mattress and is not designed for standalone use.