Get targeted support for your back and core from extra-supportive gel memory foam placed in the middle of the mattress, more support for your whole body with a densely packed coil design, and pressure-relieving comfort you can count on with additional memory foam–all topped with a refreshing cool-to-touch cover and a medium feel.ComfortLoft™ Knit Cover with Chill™ and AllergenProtect™: Feel refreshing cool-to-touch comfort the moment you lie down, plus get super-soft stretch and easy care from the soft knit fabric. Plus, stay fresh and clean by protecting your mattress from common allergens, such as dust mite dander. Bring on the puppiesResponse™ Pro HD Encased Coils: Get even more support for your whole body with this densely-packed system of our most durable coils. Individually wrapped, they also reduce motion transfer so you’ll feel less movement from your partner throughout the nightTargeted Support SealyCool™: Gel Memory Foam is stacked in the middle of the mattress, directly under your back and core, to ensure your body stays properly sustained while you sleepSealyCool™ Gel Memory Foam: Get targeted support and quality, cooling comfort from this gel-infused memory foamSealyCool™ Air Gel Foam: Get ultra-cushioning comfort and added airflow with this super-soft version of our high-quality traditional foam, uniquely shaped with peaks and valleysSealyCool™ Gel Foam Firm: Get cushioning comfort and more flexible and durable support with the cooling comfort of this gel-infused version of our high-quality traditional foamSealySupport™ Gel Foam: A version of our high-quality traditional foam, SealySupport™ is found deep down in the mattress for a unique combination of cushioning comfort and flexible supportDuraFlex™ Pro Edge System: Densely-packed coils surround the edge of your mattress to create a solid seating surface, more space to sleep, and added durability. A ventilated design provides refreshing airflow. Go ahead–take a seat.Mattress Top Type: Tight TopMattress Type: InnerspringIncluded: 1 Mattress(es)Features: Wrapped Coils, Foam Layer, Cushioning Layer, Fire Resistant, Adjustable Base CompatibleAdditional Information: Suitable for Adjustable Bed FramesCoil Count: 658 CoilsManufacturer Warranty: 10 Year LimitedBed Size: TwinMeasurements: 38 Width/Inches, 74 Length/Inches, 13 Height/InchesBase Material: 100% PolyurethaneComfort Type: Cushion FirmCare: Spot CleanCertifications And Listings: Cpsc - 16 Cfr 1632 Compliant, Cpsc - 16 Cfr 1633 CompliantMattress Height: 13"Country of Origin: Made in US 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 1-800-442-7902Don’t forget to print off your delivery checklist to avoid any delays or issues when delivering your item. Includes mattress only. Mattress plus box spring option also available. This mattress meets the requirements of 16CFR Part 1632 (federal flammability (open flame) standard for mattresses and mattress padsThis mattress meets the requirements of 16CFR Part 1633 (federal flammability (open flame) standard for mattress sets) when used with foundation Sealy® Posturepedic Plus Porteer Medium - Mattress Only