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Dimension Image. Please refer to the Dimension Tab on this page for dimension details.

Kingsdown Twin Xl High Profile Foundation

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SKU: 50883478

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Handcrafted Excellence

Handcrafted in the United States, our master artisans are committed to better sleep through exceptional craftsmanship.

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Finest Materials

Every square inch of a Kingsdown mattress is handcrafted with superior materials, not just the parts you can see and touch.

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Tested and Certificate

Every single mattress is tested and certified before it leaves our hands to ensure consistent quality and accurate support.

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Kingsdown

For over a century, the Kingsdown name has been synonymous with unprecedented quality. Every detail is considered, and we ensure superior material selection and perfection, right down to the last stitch of our renowned tailoring. Since 1904, we’ve never compromised on comfort, and neither should you.

You'll Love Kingsdown

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Sleep Cooler

Kingsdown mattresses are designed to help regulate temperature for cooler, more comfortable sleep.

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Motion Isolation

Individually wrapped coils decrease motion transfer, and select models feature an added buffer that runs the length of the mattress to mitigate partner disturbance.

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Highly Rated

Kingsdown mattresses are highly rated with over 20,000 reviews, averaging 4.7 stars and a 96% referral rate.

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 Warranty

Color

Black

Foundation height

9 inches

Pattern

Solid

Upholstery material

Fabric

39.00"w x 80.00"d x 9.00"h

4 out of 5 stars

Based on 5841 ratings
5
61%
4
11%
3
8%
2
6%
1
13%
Snoozing machine

Pretty good

This review was collected as part of a promotion

Very comfortable mattress, and easy delivery!

Review provided by Sealy

Reviewed On Jul 7, 2026
Neck relief

Great neck pillow

This review was collected as part of a promotion

This has allowed me to wake up without a neck ache. I have tried several pillows over the years. This is the best one I’ve had. I have a neck injury, and this has helped me tremendously.

Review provided by Sealy

Reviewed On Jul 7, 2026
Mike

Mattress is awesome. Flat foundation is not a flat foundati.

This review was collected as part of a promotion

The Reserve mattress is very comfy and luxurious. The flat foundation I was disappointed with. It’s not a true flat foundation.

Review provided by Sealy

Reviewed On Jul 7, 2026
Happy in Houston

Excellent Solution for Existing Mattress

This review was collected as part of a promotion

Great product... Definitely recommend!

Review provided by Sealy

Reviewed On Jul 7, 2026
Happy in Houston

Love the Pillow

This review was collected as part of a promotion

Great Product

Review provided by Sealy

Reviewed On Jul 7, 2026