This 8 in. Dual Layer Mattress features a 2 in. layer of SureCool memory foam with gel infusions that conforms to the body and helps to align the spine. The second layer is made of six in. of high-density foam that gives the mattress its signature medium-firm feel. The foam is infused with SureCool gel and designed with PureFlow ventilation to keep air flowing and maintain a comfortable sleeping temperature. Textured, breathable fabric cover tops this CertiPUR-US quality certified foam for unbeatable comfort and reliability.  Mattress Top Type: Tight Top Mattress Type: Memory Foam, Mattress In A Box Included: 1 Mattress(es) Features: Breathable Manufacturer Warranty: 10 Year Limited Bed Size: Twin Xl Measurements: 80 Length/Inches, 8 Height/Inches, 39 Width/Inches Maximum Weight Limit: 650 Lbs Base Material: 100% Polyurethane Comfort Type: Firm Care: Spot Clean Certifications And Listings: Certipur-Us Certified Country of Origin: Made in US 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.