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    Flat Foundation

    Engineered to support your Stearns and Foster® mattress with a perfectly solid, flat surface.

    Profile
    $315.00
    Free Delivery — Arrives in 2-3 Weeks
    • Designed in the USA
      Crafted with care and to last

    • Designed in the USA
      Crafted with care and to last

    • Free Shipping
      Arrives via UPS Ground Delivery



    Fashion
    + Function

    The perfect mattress isn't complete without the perfect foundation. Our flat foundations are designed to take the place of a traditional box spring and can be placed directly on your existing bed frame.

    SF Lux Estate mattress on a foundation
    SF Lux Estate mattress on a foundation

    Fashion


    + Function

    The perfect mattress isn't complete without the perfect foundation. Our flat foundations are designed to take the place of a traditional box spring and can be placed directly on your existing bed frame.

    SF Mattress on a foundation

    CRAFTED TO

    Complement



    Constructed with the finest textiles, our Stearns & Foster® foundation is designed to enhance the look and feel of your mattress.


    Why You'll Love It

    SF Lux Hybrid mattress on a foundation



    Perfect Match

    Our solid surface foundation is crafted to provide years of stationary support. Designed and upholstered to complement our mattresses and your bedroom décor.

    Why You'll Love It

    SF Lux Hybrid Mattress on a foundation Mobile


    Perfect Match

    Our solid surface foundation is crafted to provide years of stationary support. Designed and upholstered to complement our mattresses and your bedroom décor.

    An image showing the difference in height between the 5 and 9 inch foundations


    Custom Comfort

    Our foundations are available in a 9” height that matches a traditional box spring and a lower 5” profile for a more modern look that will easily fit through more narrow stairways.



    Custom Comfort

    Our foundations are available in a 9” height that matches a traditional box spring and a lower 5” profile for a more modern look that will easily fit through more narrow stairways.

    SF_flatbase2.original
    SF mattress on a foundation

    Crafted


    For you

    Constructed with the finest textiles that enhance the look and feel of your mattress, our Stearns & Foster® Foundation is designed to complement your style.

    Looking to Upgrade Your Bed?

    Get a $200 instant gift when you purchase an Ease Base with your mattress. The Ease Base adds unlimited adjustable positions to help you sleep soundly at night and enhance your sleep sanctuary.

    $200 Instant Gift with an Ease Base

    Benefits:

    • Unlimited Head and Foot Positions
    • Wireless Remote Control
    • Zero Gravity Preset Position
    • Free Delivery and In-Home Set-Up

    Shop Now

    Looking to Upgrade Your Bed?

    Get a $200 instant gift when you purchase an Ease Base with your mattress. The Ease Base adds unlimited adjustable positions to help you sleep soundly at night and enhance your sleep sanctuary.

    $200 Instant Gift with an Ease Base

    Benefits:

    • Unlimited Head and Foot Positions
    • Wireless Remote Control
    • Zero Gravity Preset Position
    • Free Delivery and In-Home Set-Up

    Shop Now

    Product Specifications

    Size Availability:

    Twin: 74L" x 38W"

    Twin Long: 79L" x 38W"

    Full: 74L" x 53W"

    Queen: 79L" x 60W"

    King: 79L" x 38W" (each piece/ 2-piece foundation)

    CA King: 84L" x 36W" (each piece/ 2-piece foundation)

    Split Queen: 79L" x 30W" (each piece/ 2-piece foundation)

    Split King: 79L" x 38W" (each piece/ 2-piece foundation)

    Split CA King: 83L" x 36W" (each piece/ 2-piece foundation)

    Product Weight:

    High Profile 9"

    Twin: 31 lbs
    Twin Long: 35 lbs
    Full: 42 lbs
    Queen: 48 lbs
    King: 70 lbs (35 lbs each piece)
    CA King: 70 lbs (35 lbs each piece)
    Split Queen: 60 lbs (30 lbs each piece)
    Split King: 70 lbs (35 lbs each piece)
    Split CA King: 70 lbs (35 lbs each piece)

    Low Profile 5"

    Twin: 25 lbs
    Twin Long: 29 lbs
    Full: 38 lbs
    Queen: 46 lbs
    King: 58 lbs (29 lbs each piece)
    CA King: 58 lbs (29 lbs each piece)
    Split Queen: 58 lbs (29 lbs each piece)
    Split King: 58 lbs (29 lbs each piece)
    Split CA King: 56 lbs (28 lbs each piece)

    Warranty & Returns:

    Warranty: Your Stearns & Foster foundation is covered under a 10 year limited warranty

    Return Policy: This product cannot be returned and the 90-Night Trial does not apply.

    Care Instructions:

    For more information on how to properly clean and care for this product, please visit our Product Care page.

    Rated 4.768421052631579 out of 5 stars

    Read Our Reviews

    Rated 4.768421052631579 out of 5 stars
    95+ REVIEWS
    AVERAGE OF 4.8 STARS

    Filter Reviews

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    Rating
    (3,482)
    (463)
    (247)
    (187)
    (386)
    Rated 5 out of 5 stars
    5
    Estate Collection – Estate Pillow Top Firm
    Jul 26, 2025
    Source:
    Stearns & Foster

    Best mattress

    Jul 26, 2025
    Gene, NW INDIANA
    Sterns and fosters have never let me down. I have always purchased from sterns and foster, now that I'm 68 years old, this bed will last the remaining years of my life, and I'm proud to say, I own an estate sterns. And foster firm pillow top bed ❣️ i couldn't ever imagine believing someone that writes negative reviews about this company. Thank you all
    Rated 5 out of 5 stars
    5
    Estate Collection – Estate Pillow Top Firm
    Jul 26, 2025
    Source:
    Stearns & Foster

    Excellent quality

    Jul 26, 2025
    Dawn , NW INDIANA
    I purchased a Queen size a estate firm Pillow, top Sterns & fosters, I actually slept till 11 o'clock this morning. I haven't felt better. I'm very excited & looking forward to my future sleeping on my bed. I have a lot of osteo problems. I am 68 years old, and this bed will last the rest of my life i'm sure I always buy stern's and fosters I'm satisfied thank you 😊
    Rated 5 out of 5 stars
    5
    Lux Estate Collection – Lux Estate Pillow Top Soft
    Jul 25, 2025
    Source:
    Stearns & Foster
    Sweepstakes

    The Perfect Mattress for me!

    Jul 25, 2025
    No longer restless, Newport News, VA
    Waking up the next morning, having slept better than I had in years, I knew that I had made the right decision to purchase the Lux Estate Pillow Top Soft mattress. (I am a restless side sleeper and at 58 years old, waking up throughout the night because I'm too HOT, does not make for a good day.) The Lux Estate is not only gorgeous! (Thank you L. Hess for making my mattress) it actually does what the advertising said it was designed to do: I stayed COOL all night long and slept incredibly well, waking up refreshed and without stiffness. The pillow top was kind to my elbows, joints and spine, and surprisingly, I'm not as restless! I absolutely adore my new mattress and I can't stop recommending it to my friends. I've slept on the mattress for a full week now and I have zero complaints. I look forward to many years with my Lux Estate. Thank you, for such a wonderful product!
    Rated 5 out of 5 stars
    5
    Lux Estate Collection – Lux Estate Pillow Top Medium
    Jul 25, 2025
    Source:
    Stearns & Foster

    Bad back gone!

    Jul 25, 2025
    Gary, Northfield, Minnesota
    We've now slept on our new mattress for two days and my wife's back ache is gone! We have a split King with medium pillow top and adjustable bases and they are so much more comfortable than our old Tempurpedic mattress. We had hoped that my wife's sore back would improve and are thrilled with the restful sleep! We love being able to adjust the beds so that we can read and watch TV in comfort! Well done Stearns and Foster!!
    Rated 5 out of 5 stars
    5
    Estate Collection – Estate Tight Top Firm
    Jul 25, 2025
    Source:
    Stearns & Foster
    Sweepstakes

    A super confrotable firm bed!

    Jul 25, 2025
    Blind side sleeper, Black diamond
    You will not regret ordering this bed. It was super comfortable from the first night I slept on it. No oder and no pillow top so I won't get the indent when I sleep on one side. The gentlemen who delivered it were great; very polite and took away my old mattress. I received my gift card in a timely manner shortly after I received my mattress. The entire experience was flawless. You won't be disqppointed! Drew Davidson
    Rated 5 out of 5 stars
    5
    Lux Estate Collection – Lux Estate Elite Pillow Top Medium
    Jul 25, 2025
    Source:
    Stearns & Foster
    Sweepstakes

    Love love love

    Jul 25, 2025
    Sleeping soundly , Atwood,KS
    Absolute comfort. Most restful sleep I’ve had in years. The mattress height is perfect. It provides just the right amount of support for side sleepers. Love this mattress.


    BUILD THE BED OF YOUR DREAMS

    SF Reserve mattress on a flat foundation in a styled room

    Discover the handmade details and finest materials that make our mattresses truly exceptional.

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    Lux Estate Mattress in a styled room raised on a base

    Upgrade to custom comfort with our Ease® Power Base—for a seamless sleep experience.

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