
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.
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.
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.
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.
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.
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.
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
Great sleep!
This review was collected as part of a promotion
We had the non coil version for 10 years and loved it. It was time to replace it and we noticed Sealy offers a coil version too! That’s what we ordered. It’s sleeps great but the top material slides, so when you turn over the mattress protector and the fitted sheet tends to slip under you. I can’t tuck those tight enough to avoid it. I still recommend either mattress and Sealy has a great reputation. Overall happy with this purchase :)
Review provided by Sealy
Great mattress
This review was collected as part of a promotion
We bought this for our toddler since we’re still cosleeping. We can finally wake up without back issues🤣 after sleeping on a purple mattress for the past 2 years. It’s shipped right away and was very easy to unroll and set up. As always good quality and sure comfortable. We also have a temperpedic proadpt hybrid and love it. 3 people have bought that mattress after sleeping at our place.
Review provided by Sealy
Great pillow
Very comfortable and well made high quality product. Finally having a good night rest.
Review provided by Sealy
Nice but a bit overpriced
This review was collected as part of a promotion
They are ok cases. The feel is soft and comfortable but they're quite expensive and barely fit the Cloud Breeze pillows.
Review provided by Sealy







