For outstanding support, the equilibria 8" mattress features 12-gauge pocket coil innerspring and a gel memory foam layer for the sleep of your dreams. The heavier gauge perimeter coils are extremely beneficial by providing excellent edge support for maximum effective sleeping surface. Even if you toss and turn all night which you most likely won’t with the comfort provided from the equilibria 8" mattress, you have much more room to spread out.  Mattress Top Type: Tight Top Mattress Type: Hybrid, Mattress In A Box Included: 1 Mattress(es) Features: Fire Resistant, Wrapped Coils, Mattress In A Box, Full Support, Adjustable Base Compatible Additional Information: Eliminates Motion Transfer, Suitable for Adjustable Bed Frames, Conforms To Body, Relieves Pressure Points Manufacturer Warranty: 10 Year Limited Bed Size: Twin Measurements: 39 Width/Inches, 8 Height/Inches, 75 Length/Inches Maximum Weight Limit: 300 Lbs Base Material: 100% Polyester Comfort Type: Medium Care: Spot Clean Certifications And Listings: Certipur-Us Certified Mattress Height: 8" Country of Origin: Imported Visit our Furniture & Mattress Customer Care Center for delivery options, protection plans and other services. Problem with an order or need help with a return? Our Furniture & Mattress Customer Service agents will be happy to help. Give us a call at 1-800-442-7902 Don’t forget to print off your delivery checklist to avoid any delays or issues when delivering your item. Mattress arrives compressed in a box and then regains its size and shape after opening.