Stearns and Foster

SX Foundation




$135.00 - $200.00
financing Special Financing for up to 12 Months*. Details.


  • See product specs below for details.
  • See product specs below for details.

    Select Size Please Select A Size
    • FULL
    • QUEEN
    • KING
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Deliver to:
ASHBURN, VA 20149 Change
20149 Change
Select Size for Availability


Available to try today at

Leesburg, VA 20175

1612 Village Market Blvd SE

(703) 771-8404

Today: open until 9:00 PM
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Details & Specs

  • Description
  • Specifications
  • About Stearns and Foster
  • Delivery & Shipping
  • Warranty
  • Description

    Crafted to complement and engineered to support your Stearns & Fosters mattresses with a perfectly solid, flat surface.

  • Specifications
    • Solid Support
    • Minimizes Motion Transfer
    • Regular or Low Foundation: 9" or 5" H
    Dimensions Twin
    • 39" W x 75" L
    • 54" W x 75" L
    Split Queen
    • 30" W x 80" L (Set of 2)
    • 60" W x 80" L
    • 76" W x 80" L(Set of 2 Twin XL)
    Cal King
    • 72" W x 84" L
  • About Stearns and Foster
    We’re proud that handmade details and the finest materials aren’t only worth uncovering but make something truly exceptional. And we’re proud that lavish comfort and unparalleled design are at the core of everything we do. From hand-stitching to hand-signing, our craftsmanship reflects the history of quality behind our name.
  • Delivery & Shipping
    Red Carpet Delivery


    Red Carpet Delivery Service

    At Mattress Firm, we roll out the red carpet for you with this premium service - tailored to YOUR schedule.

    • Same or next day delivery available in most locations, visit a store, call or chat for more details
    • Free in-home set up of your mattress*
    • Courteous and professionally trained Dream Team Delivery™ personnel
    • Red carpet and sanitary blue booties to protect your home
    • You can track your delivery here.

    Red Carpet Delivery Details

    If your delivery is late, simply contact the store of your original purchase after signing the delivery manifest with the delivery time stamp and we will credit your account or mail a refund check for the price of your delivery fee within three weeks.

    Participation may vary. See store for details. Not applicable on all products. As part of our Red Carpet Delivery Service, we will contact you to schedule delivery whenever it's convenient for you. While we install your new mattress, we will also haul your old mattress away.

    We do not ship internationally, to PO Boxes, Alaska or to Puerto Rico. For shipping to Hawaii please Chat or Call. 1-877-384-2903

    A person 18 years or older must be present to receive the delivery. If the delivery is missed because you are not at home during your scheduled delivery window, a $99.99 redelivery fee will be required before scheduling a redelivery.

    *Bedroom furniture or adjustable bases do not qualify for in-home set up.

  • Warranty

    10 Year Limited Warranty

    Sealy mattresses are designed to work on a firm,solid-surface, non-spring foundation or adjustable bed base that is structurally capable of supporting the weight of Purchaser’s Sealy mattress and user(s). This Limited Warranty and other performance warranties are based on tests conducted on “sets” that consist of our mattresses and our foundations/adjustable bed bases. Therefore, if Purchaser uses inappropriate foundations, box springs, adjustable bed bases, or bed frames with the mattress, such use will void this limited warranty and all other warranties, whether expressed or implied, including, without limitation, the implied warranties of merchantability and fitness for a particular purpose.

    The length and terms of this warranty may be determined from information contained on the law tag attached to the mattress. With reference to the figure below, on your mattress’s law tag, find the “Warranty” field. The Warranty field contains a Warranty Code and a 12-digit Serial Number. Copy the Warranty Code and 12-digit Serial Number into the spaces provided below. The Number left of the slash mark is the period (in years) which warrantable repairs or mattress replacement is provided without a deductible (exclusive of any applicable transportation and inspection costs). The number to the right of the slash mark is the total warranty period in years. If the number to the left of the slash is less than the number to the right of the slash, this means your mattress warranty has a deductible for any warrantable repairs or replacement. For example, if the Warranty Code Is 10/10, your mattress has a 10-year limited warranty with any warrantable repairs or replacement during the 10-year period being provide without a deductible, but you are responsible for any applicable transportation and inspection costs. If the Warranty Code is 5/10, your mattress comes with a 10 year limited warranty and any warrantable repairs or replacement during the first 5 years of the warranty period are provided without a deductible.However, you are responsible for any applicable transportation and inspection costs. To calculate the applicable deductible for any warrantable repair or replacement (exclusive of applicable transportation and inspection costs), use this simple formula: (Current Manufacturer's Suggested Retail Price for the Mattress) X (Number of Years From the Purchase Date of Your Mattress) Divided by the Number to the Right of the Slash Mark. For example, if the Current Manufacturer's Suggested Retail Price or your mattress is $500 and the Warranty Code on the law tag of your mattress is 5/10,for any warrantable repairs or replacement in year 8 of ownership, the deductible will be (500 x 8)/10, or $400. If Your mattress is discontinued, Sealy has sole discretion to determine the retail price of a comparable mattress model that will be used to determine the deductible per the formula above. Your purchase date is established from the date of your sales receipt.

    Sealy may require Purchaser to provide proof of the quality of the foundation, adjustable bed base, or bed frame used in conjunction with the mattress if Purchaser Makes a claim under this Limited Warranty. Sealy makes no representations whatsoever as to the structural integrity or rated load for any frame, foundation, or adjustable base not manufactured by or for Sealy. Sealy Reserves the right to invalidate this Limited Warranty If the foundation is determined, in Sealy’s reasonable discretion, to be inadequate or if the mattress is found to be in an unsanitary condition.

    This Limited Warranty only covers manufacturing defects in a mattress or foundation when the set is subject to proper handling and normal use in conjunction with a bed frame that provides Continuous Support. To provide Continuous Support, a Queen Or King frame must have 1) a rigid bridge bar with a supporting leg and 2) at least 5 legs, or 5 equally spaced hardwood cross-slats.

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