GEL MEMORY FOAM MATERIAL: Our memory foam mattress topper easily conforms to the curves and shape of your body, distributes weight evenly to relieve pressure points for better sleep. More Comfortable Sleep: Gel memory foam used in our mattresses reduces heat and improves airflow to update the permeability of the gas; add the mattress for customized comfort. Soft but not foldable: our mattress is soft, does not roll up and store too long after opening and not put items on the top, which increases the risk of tearing. Certified PUR-US Certified: Our Gel Swirl Memory Foam Topper is made from CertiPUR-US certified materials. The Gel Swirl Memory Foam Topper Meets or Exceeds Standards for Content, Release and Durability. Before first use: leave the memory foam flat in a well-ventilated area for 48-72 hours until it is fully extended. In addition, we provide 3 year warranty and 24-hour manual customer service to ensure your customer service.