
Kingsdown Twin Xl High Profile Foundation
SKU: 50883478
Kingsdown foundations are meticulously hand assembled using sustainably sourced Canadian Spruce, which is exceptionally durable. Each piece of lumber is not only heat-treated, but kiln-dried, which improves the performance of the wood over time. Each wooden slat is placed more closely together and cut a full inch wider than most manufacturers to provide a sturdier base.
Collection
Box Spring
Warranty
10 year limited warranty -
Code J -
View WarrantyColor
Black
Foundation height
9 inches
Pattern
Solid
Upholstery material
Fabric
Q&A answers generated with AI assistance.
How does the slat construction provide better support for a mattress?
To provide a sturdier base than standard models, the wooden slats in this foundation are cut a full inch wider and placed more closely together. This increased surface area offers superior reinforcement for your mattress, helping to prevent the sagging and dipping that can occur with less robust support systems, thereby extending the life of your mattress.
Why is kiln-dried Canadian Spruce used in this foundation’s frame?
This foundation is crafted from sustainably sourced Canadian Spruce that has been both heat-treated and kiln-dried. The kiln-drying process is a critical quality step that removes deep-seated moisture from the wood, significantly reducing the risk of warping, shrinking, or cracking over time. This expertise in material preparation ensures the frame remains structurally sound and silent throughout its lifespan.
Why is a solid foundation often preferred over a traditional box spring?
Unlike a traditional box spring that uses flexible wire coils, this solid wood foundation provides a completely flat, non-yielding surface. This rigid support is essential for modern memory foam and hybrid mattresses, as it ensures they stay perfectly level to provide correct spinal alignment and prevents the internal mattress materials from shifting or warping.
Does this foundation require home assembly?
No, this foundation is meticulously hand-assembled by craftsmen before it reaches your home. It arrives fully built and ready for immediate use, allowing you to complete your bedroom setup without the need for tools or the hassle of complex instructions.
What is the benefit of a "high profile" 9-inch foundation?
A 9-inch high-profile foundation provides a traditional bed height, making it easier to get in and out of bed compared to lower-profile options. This height is ideal for standard bed frames and is a popular choice for larger master bedrooms where a taller bed profile creates a more substantial, elevated aesthetic.
Can two of these foundations be used together for a split king bed?
Yes, two Twin XL foundations are the standard requirement for a King or Split King mattress setup. At 80 inches long, they provide the necessary extra length for "XL" mattresses. Placing two side-by-side creates a stable, 78-inch wide base that is much easier to navigate through narrow stairwells or apartment doorways than a single-piece king foundation.
39.00"w x 80.00"d x 9.00"h

4 out of 5 stars
Must have
Must have if you buy the best mattress Sterns Foster
Love Tempur-Pedic!
This review was collected as part of a promotion
We bought the Tempur-Adapt+ Cooling Topper a few years ago for our bed that was not so comfortable anymore. Absolutely loved it! Later we bought a new RV and couldn't sleep. Bought the same topper again for the super uncomfortable RV bed. It was a gamechanger! We just bought a little vacation home and bought a cheap mattress. Was not comfortable, so ordered a 3rd topper. Sleep like a baby now in all three beds! Highly recomend!
Review provided by Sealy
Meh.
This review was collected as part of a promotion
This wasn't a good purchase for me. It's not very firm. I bought TEMPUR pillows in the past and this one does not measure up. I'll keep looking for a better product.
Review provided by Sealy
Perfect fit
This review was collected as part of a promotion
Perfect fit for my amazing new mattress!
Review provided by Sealy
The best pillow in the world for me !!
This review was collected as part of a promotion
I own 4 Tempur-pedic pillows since 2020 - at home, parents' home, vacation home, and for biz travel. For my tired head and neck from 14-hour work days on the computer, this is simply the best pillow in the world. Perfect neck support (I am a right-side & back sleeper), perfect texture, durable, comfortable. The pillow maintains its consistent quality for years. It has improved my quality of sleep 1000%. After years and years of marginal and uncomfortable pillows, I would not use any other pillow except Tempur-Pedic. I literally travel around the world with one, to make sure I have the best sleep.
Review provided by Sealy







