We combined a 2.5-inch layer of ventilated gel memory foam and a 7.5-inch layer of high density support foam for a pressure-relieving and supportive mattress with a medium-firm feel. Infused with heat-capturing gel material, the top memory foam layer is designed to prevent heat build-up. Microscopic gel beads capture heat and move it away from the body to help regulate temperature as you sleep. This surface layer of memory foam has a ventilated design that improves airflow. The open cell structure of LUCID memory foam makes for a longer lasting, more resilient foam that will not leave long-lasting body impressions. Made of a cozy TENCEL blend fabric (10 percent TENCEL lyocell, 90 percent polyester), the soft cover creates a breathable air layer at the top of the mattress. The foam used in this mattress is CertiPUR-US certified, which means the foam has been independently tested for safety of materials used, physical performance and environmental stewardship. Careful construction guarantees no prohibited phthalates, no ozone depleters, no CFCs, no mercury, no formaldehyde, no PBDEs, and low emission (VOCs) for indoor air quality. This mattress does not contain synthetic or natural latex of any kind. We offer a 25-year warranty that protects the mattress and cover against manufacturer defect. All of our products are shipped vacuum packed, so your mattress is easy to transport and set up. After your mattress arrives, simply take the package into the right room, remove it from the box and protective wrap, and then watch as it expands.Dual Layer Mattress Combines 2 5 Gel Infused Ventilated Memory Foam Surface 7 5 High Density Foam Base For Excellent Support With A Medium Firm FeelGel Infused Memory Foam Regulates Temperature While Conforming To The Body To Ease Pressure PointsFoam Is Certipur Us Certified For Safety And PerformanceCompressed And Boxed For Convenient Shipping And SetupTemperature Regulating Moisture Controlling Tencel Blend Fabric Cover Creates A Comfortable Air LayerMattress Type: Mattress In A BoxFeatures: Memory Foam, Mattress In A BoxMeasurements: 38 Width/Inches, 75 Length/InchesBase Material: 100% PolyethyleneFiber Content: 90% Polyester, 10% Tencel LyocellCountry of Origin: Imported Includes mattress only. Mattress plus box spring option also available. Mattress arrives compressed in a box and then regains its size and shape after opening. Lucid 10 Inch Dual-Layer Gel Memory Foam Mattress