YRLLENSDAN 8 Inch Twin XL Gel Memory Foam Mattress/CertiPUR-US Certified/Bed-in-a-Box/Cool Sleep & Comfy Support

Box Bed - The mattress is compressed and packaged in a box for transportation, so it can easily be delivered to your doorstep and expand into a fluffy shape at home. Please use the mattress within 72 hours after opening it and allow it to fully recover. Support and Decompression - A medium hardness mattress is an excellent choice for those who sleep in the back, sides, and stomach. The buoyant, non sinking support foam can adapt to and fit your body to achieve the best decompression. Multiple Choices - Our mattresses come in 5 different thicknesses -5/6/8/10/12 inches, each with 6 sizes - double bed,double XL bed, full bed, large, king size, California King size, perfect for upgrading your marriage bedroom, children's bedroom, student dormitory, apartment, RV or guest room! The breathable surface and Certipur American certification - diamond knitted fabric better conforms to the warp and weft structure of the fabric, making the surface more temperature adjustable. Our mattresses have undergone rigorous independent safety testing and have passed CERTIPUR-US certification for durability, performance, and content. General precautions: Please allow 24-72 hours for the mattress to return to its original state. Any memory foam will expand faster in a warm room. In cold temperatures, it may take longer for your mattress to recover from compression to full size upon delivery. The expansion time of a mattress may vary depending on the environment.