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96% of customers were happy with their purchase.

Mattress Firm 300 Adjustable Base

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    Why Our Sleep Experts® Love It

    "If you are looking for increased pressure relief, this is the way to go with feet and head adjustment to just the right position!"- Dennis Ottochian, Sleep Expert

    Helps With
    Acid Reflux icon
    Acid Reflux
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    Sleep Apnea
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    The Mattress Firm® 300 offers a personalized sleep experience with head and foot adjustment settings designed to help alleviate joint pains and provide increased pressure relief. Plus, the wireless remote makes finding your perfect position easy with its backlit buttons and programmable memory option.

    The base is 100% versatile featuring removable legs making this base compatible with all bed sets including platform beds. Protect your adjustable base with FirmCare Protection Plan.


    Total Size 58.5" W x 79.5" L
    Weight Capacity 850 lbs.
    Max Height 38.25"
    Min Height 15"
    Length 79.5"
    Width 58.5"
    Adjust Your View


    • Independent Head Articulation
    • Independent Foot Articulation
    • 850lb Lift Capacity
    • Split-Sizes available to purchase via Call (877-349-6231)/Chat or In-Store


    • Classic Foundation Style Design
    • Zero-Clearance Platform Friendly
    • Adjustable Legs 6” – 10”
    • Furniture Grade Upholstery
    • Removable Legs


    • Wireless Backlit Remote
    • One Touch Flat
    • Flashlight Remote
    • 1 Programmable Memory Option
    About mattress firm
    For over 90 years, Mattress Firm® and our family of companies have made it our mission to help you find great sleep. How do we do it? For starters, our Sleep Experts® have trained over 200 hours so they can match you with a complete sleep solution: mattresses, bedding and more. Plus, you can shop confidently with our Love Your Mattress Guarantee®, which means you’ll get a low price on America’s best brands, delivered your way and with a 120 Night Sleep Trial®.
    Delivery & Shipping

    Silver Service

    Online & In-Store

    Regular $24.99


    Includes transportation, mileage and tolls

    Home protection from outside direct and elements

    Delivery where you want - front door, side door or even garage

    Contactless delivery, meaning we won’t enter your home

    Gold Service

    Online & In-Store


    Includes all Silver services plus:

    New mattress and box spring setup

    Removal of packaging material from purchased item(s)

    Removal of old mattress set (equal to the number of pieces purchased)

    Three maximum flight of stairs purchased items can be carried

    Platinum Service

    Online & In-Store


    Includes all Gold services plus:

    Five maximum flight of stairs purchased items can be carried

    Delivery and setup of up to three mattress sets

    Setup of adjustable bases purchased from Mattress Firm

    Diamond Service

    In-Store, Chat & Phone


    Includes all Platinum services plus:

    Five Maximum flight of stairs purchased items can be carried

    Choice of preferred two-hour delivery window at the time of purchase (based on availability)

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