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.
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.
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.
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.
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.
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
The Coolest, Most Comfortable Sleep of My Life
The TEMPUR-ActiveBreeze® has been an absolute revelation. I've always slept hot, and this mattress has completely solved that problem — the active cooling technology keeps the surface noticeably cool all night long. On top of that, the pressure relief is incredible. I no longer toss and turn, and I wake up without any of the aches and stiffness I used to have. The build quality is outstanding and it truly feels like a premium product. After just a few nights, I couldn't imagine going back to any other mattress. If you're a hot sleeper looking for the perfect combination of cooling and comfort, this is it.
Review provided by Sealy
Good
This review was collected as part of a promotion
Not as cooling as expected, it warms up pretty fast. It also takes longer to comeback to initial form (we bought the medium hybrid)
Review provided by Sealy
Very, very, very, very firm
This review was collected as part of a promotion
I’ve had, and loved Tempurpedic pillows in the past. I purchased this one as a replacement for one that I’ve had for a few years. This one was not even close to as comfortable as previous versions. It’s firm to the point of being uncomfortable. I have loved the neck support and just the right amount of “give” in my older versions. There is neck support, but NO “give”. I wanted to love it as I have done in the past but after only a few nights, this one was retired to the closet. Since it cannot be returned, I’m stuck with a brick.
Review provided by Sealy
Better sleep
This review was collected as part of a promotion
I ordered this topper because our old mattress was too hard for my side sleeping position. When I added the topper I was able to sleep much better.
Review provided by Sealy
Very comfortable!
Bought the topper to soften a memory foam mattress that was too hard and difficult for me to regulate my body temperature. This topper is great - it's relieved pressure points in my back and my husband's hips and I rarely have issues with body temperature.
Review provided by Sealy