Beautyrest® Flat Foundation


A box spring alternative that provides the perfect support for your Beautyrest® mattress.

76" long x 40" wide x 9" high

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  • Overview
  • Details
  • Shipping & returns
If you are looking to add a little height to your bed or just simply extend the life of your Beautyrest® mattress, the Beautyrest® Flat Mattress Foundation is the perfect solution. Designed to provide long-lasting comfort, the Beautyrest® flat bed foundation includes a spruce framework and welded steel elements for greater support and durability. 
  • Available in all standard sizes
  • Center support extends to the floor for queen or king sizes 
  • Meets or exceeds State and Federal Fire Retardancy Standards when used either by itself or with an approved Beautyrest® mattress

Materials & Construction
Foundation height: 9”

Twin: 74"L x 37.5"W x 9"H
Twin XL: 79"L x 37.5"W x 9"H
Full: 74"L x 52.5"W x 9"H
Queen: 79"L x 59.5"W x 9"H
King: 79"L x 75"W x 9"H
California King: 83"L x 71"W x 9"H

Beautyrest® foundations are designed to be supported by platform frames or traditional bases.

All of the Beautyrest mattresses and bases sold here are conveniently delivered using our complimentary White Glove Delivery experience. Typically, within 1 week of placing your order, you’ll be contacted by our shipping partner to select a delivery day that works best for your schedule. The day of your delivery, you’ll get a call confirming your delivery window. Upon delivery, they will set up your new mattress and remove your old mattress and any packaging for that mattress.  Most items ship in 2-4 weeks. We do not ship to Alaska or Hawaii at this time.

Your base purchase includes a 100-Night In-Home Trial. If, at any point during your trial, you are unhappy with your Beautyrest® mattress, simply reach out to us and we will help you initiate a return and receive a full refund of your purchase.

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With over 3,000 retail partners, it's easy to experience the premium materials and luxurious comfort in person.


Can I use the Beautyrest Flat Foundation for any of the Beautyrest Mattresses?

Yes, the Beautyrest Flat Foundation can be used with all of the mattress models available on Please keep in mind it was designed to match the Beautyrest Hybrid and the Beautyrest Harmony Lux mattresses.

Do I have to use the Beautyrest Flat Foundation?

A new foundation will always help to ensure proper setup and support for your new mattress, but we do not require that you pair this foundation with our mattress. You can use a different foundation or box spring as long as it provides proper support for the mattress.

What is the weight capacity of this base? 

There is no specified weight capacity for the Flat Mattress Foundation. That being said, we advise that you follow the weight capacity of your frame.

What is the height of the Flat Mattress Foundation?

The Beautyrest Flat Foundation is 9" tall.

The Beautyrest Experience


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Beautyrest® Flat Foundation



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