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Powell | Medium-Firm

Powell | Medium-Firm

Hybrid Design + Hypoallergenic

Silver collection

54+ people bought

  • Hybrid Technology offers an Upgraded Support System including 2-Sided Edge Support and Motion Isolation
  • Made with Hypoallergenic Latex Foam which helps to relieve Pressure Points and Improve Circulation
  • Good for Light-Average Sleeper Weights
Mattress height:
Sleep type:
  • Back sleeping position
    Side sleeping position
    Stomach sleeping position

    All sides

  • Mattress type:




    Size Size guide

    Twin XL






    This size will be back in stock in 5-7 days

    Call to order now



    Split King


    Bed frame options

    Total Price

    In stock. Delivery by June 17

    Our benefits

    100-Night Trial

    Free One-Day Delivery

    10 Year Warranty

    Learn more


    Construction of Mattress:

    4 Layer Design + Hybrid Cover

    • Ultra Conforming ThermoBalance® Cooling Cover with Phase Change® Technology
    • 1“ Layer of Copper Infused Natural Talalay Latex Foam
    • 1” Layer of Super Soft Comfort Foam
    • 768 Individually Pocketed Coil System with Quantum® Edge Steel Perimeter
    • 1” Layer of Durable Base Foam


    All foams meet CertiPUR-US® standards for content, emissions, and durability, and are analyzed by independent, accredited testing laboratories.

    Protected by a chemical-free and fiberglass-free fire barrier meeting 16 CFR 1633 and 16 CFR 1632 compliance


    This mattress is backed by a 10-year warranty from the manufacturer. For full details, please read our warranty information here.

    Where it’s made

    American Craftsmanship: Made in Oklahoma.

    Expert Assistance Awaits

    Get expert advice from our sleep specialists to ensure your best night’s sleep.


    Prefer a Personal Touch? Book Your In-Store Visit to discover mattresses and sleep essentials customized for your comfort.

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    Discover the Comfort Layers in Our Mattress

    Crafted for comfort and support, it's hybrid design includes a hypoallergenic copper-infused Talalay latex layer and Quantum® Steel Dual Sided Edge Support for superior motion isolation. The ThermoBalance® Cooling Cover with Phase Change Material ensures a cool sleep, while the latex foam alleviates pressure points and improves circulation. Ideal for those seeking a medium-firm feel with health-conscious materials and optimal temperature control.


    Firmness Scale



















    Pressure Relief





    Air Circulation




    Customer Reviews

    Discover what our customers say about Mattress King.


    1,506 reviews

    Frequently Asked Questions

    What are the benefits of a ThermoBalance® Cooling Quilt in mattresses?

    The ThermoBalance® Cooling Quilt is a specialized fabric integrated into mattresses, designed to enhance sleep quality by regulating body temperature. Made from viscose derived from wood pulp, it features unique hollow fibers that naturally wick away moisture. This advanced technology helps to dissipate body heat, maintaining a thermally balanced sleep environment. Beyond its temperature-regulating capabilities, the fabric offers a soft, silky touch, adding an extra layer of comfort. The ThermoBalance® quilt ensures that you sleep comfortably without overheating, embodying a perfect blend of luxury and performance for an optimal sleeping experience.

    What is the Quantum Edge steel support in mattresses?

    The Quantum Edge steel support in mattresses features a unique construction with narrow-diameter thicker gauge wire Quantum coils at the sides, head, and foot. This design enhances edge support, offering a firmer and more supportive edge than traditional mattresses. The Quantum Edge system replaces foam encasement, providing a sturdy seating edge and expanding the usable sleep surface. The Quantum steel narrow coils that provide the edge support allow the mattress to be a little more flexible compared to foam encased edge support when using on an adjustable base. Additionally, its design promotes 28% more airflow and breathability when comparing to a foam encased edge support, contributing to a comfortable sleep experience.

    Who Handles Deliveries for Mattress King?

    At Mattress King, we take pride in providing a personalized delivery experience. We do not use third-party services; instead, all deliveries are handled by our in-house team, fully employed by Mattress King. Our professional delivery crew arrives in branded Mattress King vehicles and wears official Mattress King uniforms. This ensures that you recognize our trusted team, specialized in the setup of mattresses and adjustable bases, ensuring a secure and expert delivery right to your doorstep.

    How does Phase Change Material (PCM) enhance the comfort of a mattress?

    PCM, or Phase Change Material, in a mattress is an innovative technology designed for temperature regulation, enhancing sleep comfort. These materials change their state (solid, liquid, or vapor) in response to temperature variations. In the context of mattresses, PCMs typically shift from solid to liquid as they absorb heat, creating a cooling effect. This process also works in reverse, where they release heat as they solidify, thus warming up the mattress if it gets too cold. This bidirectional thermoregulation helps maintain an optimal sleeping temperature by redistributing body heat from warmer areas to cooler ones. PCMs are often incorporated into mattress covers or infused into the foam layers, especially in memory foam mattresses, to mitigate heat retention, a common issue with this mattress type. This technology not only enhances sleep quality by maintaining a comfortable temperature but also contributes to the durability and performance of the mattress.

    What advantages does copper-infused Talalay latex foam offer in mattresses?

    Copper-infused Talalay latex foam in mattresses combines comfort with health benefits. Its copper content offers anti-inflammatory properties, aiding in pain relief for conditions like arthritis. Talalay latex itself is breathable and conforms to body contours, providing excellent support and muscle relief. Additionally, it's hypoallergenic, resisting dust mites and allergens, making it ideal for those with asthma or allergies. This combination ensures a restful, hygienic, and supportive sleep environment.

    Does Mattress King Offer Old Mattress Removal Services?

    Absolutely! When you opt for our upgraded delivery service, which includes setup and haul away, we take care of your old mattress and box springs. Please note that this service does not extend to bed frames or other furniture. For us to safely remove your mattress and box springs, they must be in a sanitary condition and free of any infestations. This way, we ensure a seamless and hygienic transition to your new sleep setup.

    Can you explain Mattress King's 100-Night Comfort Guarantee?

    Absolutely! At Mattress King, we're dedicated to ensuring you find the perfect mattress for your sleep needs. That's why we offer an exclusive 100-night trial period on eligible mattresses. To participate in this trial, simply purchase one of our mattress protectors with your new mattress.

    If you find that your new mattress doesn't quite meet your comfort needs, don't worry. We offer a hassle-free, one-time exchange for a mattress that better suits you. There are no restocking fees involved – the only cost is a minimal one-time delivery fee. It's important that exchanges are conducted through Mattress King's official delivery service to guarantee proper handling of your returned mattress.

    Your trial period kicks off from the day you receive your mattress. We recommend sleeping on it for at least 21 days, as this gives your body enough time to adjust to the new sleeping surface.

    For more detailed information about our trial policy, please visit Mattress King's Trial Policy.