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Sapphire | Medium

Sapphire | Medium

Great Comfort + Unbeatable Price

Bronze collection

482+ people bought

  • Excellent Value
  • Support System offers Total Perimeter Edge Support and Motion Isolation
  • Good for a Light-Average Sleeper Weight
Mattress height:
Sleep type:
  • Back sleeping position


    Side sleeping position


  • Mattress type:

    Individual pocketed coil



    Size Size guide









    Twin XL


    Bed frame options

    Total Price

    In stock. Delivery by July 18

    Our benefits

    100-Night Trial

    Free One-Day Delivery

    10 Year Warranty

    Learn more


    Construction of Mattress:

    6 Layer Design

    • .75” Super Soft Foam and 1” Super Soft Foam Sewn into a Knit Quilt
    • 2“ Layer of Super Soft Foam
    • 1.75“ Layer of Convoluted Soft Support Foam.25” Lumbar Layer of Gel Infused Memory Foam
    • .5“ Layer of Support Comfort Foam
    • 768 Quad Pocket Coil System with Foam Encased Edge Perimeter


    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 Texas.

    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.

    View full details

    Discover the Comfort Layers in Our Mattress

    Experience the Sapphire Mattress, an affordable luxury blending comfort and durability. Its unique 768 Quad Pocketed Coil System ensures optimal support and motion isolation, while the 360-degree edge support expands your sleeping area. Topped with a cooling IceTEX quilt and layers of plush foam, it promises a restful sleep every night.


    Firmness Scale



















    Pressure Relief





    Air Circulation




    Customer Reviews

    Discover what our customers say about Mattress King.


    1,506 reviews

    Frequently Asked Questions

    What is 360-degree edge support on a mattress?

    360-degree edge support in a mattress refers to the reinforcement around the entire perimeter of the bed. This support is vital for several reasons:

    1. Preventing Sagging: It helps prevent sagging at the edges, maintaining the mattress's shape and structure over time.

    2. Increased Usable Surface Area: With strong edge support, the entire surface of the mattress becomes usable for sleeping and other activities, such as sitting. This is particularly beneficial for couples, as it allows them to use the full mattress without the fear of rolling off.

    3. Ease of Mobility: For individuals with mobility issues or those who experience back or joint pain, a firm edge support makes getting in and out of bed easier. It provides a stable base to sit on and assists in transitioning from sitting to standing.

    The construction of 360-degree edge support can vary. In some mattresses, this involves using firmer foam or high-density foam wrapped around the core mattress, providing extra support. In others, particularly in hybrid mattresses, the edge support is achieved with coils placed close to the sides.

    What are the dimensions of a mattress?

    At Mattress King in Oklahoma, we cater to a variety of sleep preferences and space requirements with our range of mattress sizes. Here are the standard dimensions for each size, along with some special options available:

    King Size: Usually measures 76 inches by 80 inches, offering ample space for couples or those who prefer extra room.

    Queen Size: Typically 60 inches by 80 inches, it's a versatile choice for couples and fits well in most bedrooms.

    Full Size (Double): Measures about 54 inches by 75 inches, suitable for single sleepers or smaller rooms.

    Twin Size: Often 38 inches by 75 inches, great for children’s rooms or compact spaces.

    Twin XL Size: Around 38 inches by 80 inches, providing additional length compared to a standard twin.

    Split King: A modern option growing in popularity, especially for those interested in adjustable beds. This setup involves two Twin XL mattresses placed side by side, forming the dimensions of a King size. This configuration allows for independent positioning, enabling each person to adjust their side of the bed.

    California King: While less common in this region and typically not a stocked size at our stores, the California King measures 72 inches by 84 inches. It's narrower and longer than a standard King, catering to those who need extra length.

    Remember, these dimensions are standard but can slightly vary depending on the brand and specific model. It’s advisable to check the exact dimensions of the mattress model you're interested in, particularly if you have specific space constraints or bed frame sizes in mind. At Mattress King, we offer a wide selection of mattresses in these sizes, ensuring we meet diverse needs and preferences.

    This comprehensive response covers the standard mattress dimensions available at Mattress King, including special sizes like the California King and Split King, providing useful information for various customer needs and preferences.

    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.

    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.

    How Do Regular Profile and Low Profile Box Springs Differ at Mattress King?

    When choosing the ideal foundation for your mattress at Mattress King, it's important to understand the differences between regular profile and low profile box springs. A regular-profile box spring is typically about 9 inches in height, providing a classic, elevated appearance. However, this option might make your mattress sit too high for some bed frames. On the other hand, our low-profile box springs, at approximately 4.5 inches tall, offer a more streamlined, low-to-the-ground look. This can not only enhance the aesthetic of your bed frame but also make getting in and out of bed easier, especially if a high mattress is a concern.

    Despite their height differences, both types offer the same level of support and durability, ensuring a solid foundation for your mattress. The choice between a regular or low profile box spring ultimately depends on your preferred bed height and style. Whether you're drawn to a statement-making taller bed or a subtle, minimalist lower bed setup, Mattress King has options to align with your personal preference.

    What is the best mattress for me?

    At Mattress King, finding the 'best mattress' is all about what uniquely suits you. Our extensive range ensures there's a perfect match for everyone's specific needs and preferences. To begin your journey to the ideal mattress, we recommend starting with our Mattress Finder Tool. This tool is designed to guide you through selecting the ideal size and budget range, helping narrow down the choices to mattresses that align with your requirements.

    But there's more to consider. Your sleep position, whether you're a side, back, or stomach sleeper, greatly influences the type of mattress that will provide the most comfort and support. Additionally, your temperature preferences – whether you tend to sleep hot or cold – play a crucial role in determining the best mattress material and design for you. And let's not forget about any specific pain points or discomfort you may experience, such as back pain or pressure points, which require tailored support and cushioning.

    Understanding these personal factors is key to finding a mattress that not only feels comfortable but also supports a healthy sleep posture, regulates temperature effectively, and addresses any specific pain or comfort needs. So, take the first step with our Mattress Finder Tool and discover the mattress that promises you the best sleep experience.