IN STOCK

SKU: 51083473
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
5 inch
Pattern
Solid
Profile height
Low profile
Upholstery material
Fabric
Q&A answers generated with AI assistance.
Can two of these foundations be used together for a King-sized bed?
Absolutely. Two Twin XL foundations placed side-by-side create the exact dimensions of a standard King-sized base. This "Split King" configuration is highly recommended for homeowners who live in houses with narrow hallways or tight staircases, as two smaller foundations are much easier to maneuver into a bedroom than a single, bulky King-sized piece.
What makes Canadian Spruce a high-quality material for a mattress base?
The frame is meticulously hand-assembled using sustainably sourced Canadian Spruce, a wood species prized for its exceptional durability and strength-to-weight ratio. To ensure long-term performance, the lumber is both heat-treated and kiln-dried. This specialized process removes excess moisture, significantly reducing the risk of warping, cracking, or squeaking, resulting in a silent and reliable support system.
How does the construction of this foundation provide better support for a mattress?
This foundation is engineered for superior stability. It features wooden slats that are placed more closely together and cut a full inch wider than industry standards. This dense slat arrangement provides a sturdier, flatter surface that prevents the mattress from sagging or shifting, which is essential for maintaining the structural integrity and comfort of both innerspring and memory foam mattresses over time.
Why is a foundation necessary if I already have a bed frame?
While a bed frame provides the perimeter structure, a solid foundation like this one is critical for even weight distribution. Our expertise in sleep systems shows that a flat, consistent base is often required to validate mattress warranties and prevent premature wear. By providing a stable surface, this foundation helps your mattress retain its shape and support levels for years to come.
Is this Twin XL foundation suitable for a college dorm or a small studio apartment?
Yes, the Twin XL dimensions (80"l x 39"w) are the standard requirement for most college dormitories and are a smart choice for space-conscious urban apartments. The 5-inch low profile is especially helpful in smaller rooms or "loft-style" layouts with lower ceilings, as it provides the necessary mattress support while maintaining an open, airy feel in the room.
What is the benefit of a low-profile foundation compared to a standard-height version?
This low-profile foundation stands at 5 inches tall, offering a sleek, modern look while making it easier to get in and out of bed. It is particularly advantageous when paired with today’s thicker, high-profile mattresses, as it keeps the overall sleep surface at a manageable and comfortable height. This is an ideal solution for those who want the support of a traditional base without the added bulk of a standard 9-inch box spring.
39.00"w x 80.00"d x 5.00"h

4 out of 5 stars
Painful and unreturnable
Puchased a size medium as suggested by product sizing guide, and it caused me a lot of pain to use. Unfortunately they do nothing to remedy when you purchase a product that isn't functional.
Review provided by Sealy
Perfect
This review was collected as part of a promotion
Perfect fit!
Review provided by Sealy
Best sheets I have ever owned!
Incredibly soft, lightweight, cool, comfortable, and somehow relaxing--like nothing I have ever experienced! They wash well, don't wrinkle, and stay in pIace. I'm so glad I decided to spend the extra money for these sheets. They're worth every penny! :)
Review provided by Sealy
Quality product
I am a large person and this mattress doesn’t sag where I lay.
Review provided by Sealy
Cool & Comfy
This review was collected as part of a promotion
Got these sheets to go along with my new mattress - love them. The combo has provided a great sleep every night.
Review provided by Sealy





