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Beautyrest Black Twin Xl High Profile Foundation

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SKU: 50837801

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Beautyrest Black®

Designed where luxury meets innovation, with Triple-Stranded Pocketed Coil® Technology for individualized support + motion separation with a quilted top mattress surface.

Discover Beautyrest Black®

Individualized Support
Individualized Support

Triple-Stranded Pocketed Coil® Technology offers our most advanced, individualized support + motion separation for every sleeping position.

Premium Materials
Premium Materials

Ventilated, Self-Response™ Latex®, designed to maximize airflow while conforming to your body for responsive pressure relief, combines with contouring memory foams and premium materials to provide luxurious comfort. *Available in select models

Advanced Temperature Management
Advanced Temperature Management

Sleep Climate™ Technology works with Micro Diamonds™ Memory Foam, a premium foam infused with diamond particles that is designed to help transfer heat away from the body, for an optimal sleep. *Available in select models

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The Beautyrest® Difference

Each Beautyrest® mattress is thoughtfully designed and assembled in the USA and CertiPUR-US certified safe against harmful chemicals, so your indoor air quality is cleaner. Plis Beautyrest® mattresses are backed by a 10-year limited warranty, so you can enjoy premium sleep for years to come.

Specifically designed to work together with your Beautyrest Black mattress, this foundation offers long-lasting support and reduced motion for restful night's sleep.

SKU: 50837801

Collection

Box Spring

Warranty

10 year limited warranty -

Code P -

View Warranty

Color

Gray

Pattern

Geometric

Profile height

High profile

Upholstery material

Upholstery

Q&A answers generated with AI assistance.

What is the primary purpose of a mattress foundation?

A foundation provides a sturdy, completely flat surface for your mattress, which is essential for maintaining structural integrity. Unlike traditional box springs that have "give," this solid base is engineered to prevent the mattress from warping or sagging over time. Utilizing a proper foundation like this one is often required to ensure total warranty protection for your mattress.


What is the difference between a high profile and a low profile foundation?

The main difference is the height. This high profile foundation stands 9 inches tall, providing a traditional bed height and a more substantial aesthetic. High profile options are ideal for those who prefer an elevated sleeping surface or are pairing the base with a thinner mattress. In contrast, low profile foundations typically measure around 5 inches and are designed for those who want a modern, lower-to-the-ground look or are using very thick, high-profile mattresses.


Is a Twin XL foundation a good choice for a college dorm room?

Yes, a Twin XL is the standard size for most college dorm mattresses. This foundation is an excellent choice for student living because its 9-inch high profile adds significant height to the bed, which can make a small dorm room feel more like a traditional bedroom. Additionally, the sturdy construction helps reduce motion transfer, which is particularly beneficial in active dorm environments to ensure a more restful sleep.


Does this foundation require assembly when it is delivered?

No, this foundation arrives fully assembled for your convenience. Based on our commitment to quality and structural stability, this item is constructed at the factory to ensure all support components are perfectly aligned and secure. It is ready to be placed directly onto your bed frame immediately upon delivery.


Will this Twin XL foundation work with a standard Twin size mattress?

No, this foundation is specifically sized for a Twin XL mattress. Measuring 80 inches in length, it is 5 inches longer than a standard Twin. It is designed to accommodate the extra length of Twin XL mattresses, which are commonly used by taller sleepers or in specific living environments like university housing.


How does this foundation contribute to a better night's sleep?

This foundation is specifically designed to work in tandem with high-performance mattresses to offer long-lasting support. By providing a stable, non-flexing base, it significantly reduces motion transfer across the bed. This means that when you move or shift positions, the foundation helps dampen the vibrations, leading to fewer sleep disruptions.

39.00"w x 80.00"d x 9.00"h

4.7 out of 5 stars

Based on 156 ratings
5
86%
4
4%
3
4%
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3%
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4%
Mini in FTL

The perfect base

This review was collected as part of a promotion

The perfect base helps ensure that our pillow top mattress functions as it should. The base provides the perfect height for our mattress and ensures that our mattress gives us years of service. I’m very happy with the decision to buy the base along with the pillow top mattress.

Review provided by Stearns & Foster

Reviewed On Oct 8, 2026
Deere

2 months of ownership - still happy

This review was collected as part of a promotion

We purchased 2 sets of the Sterns & Foster mattress and foundation. We have had them for 2 months and very happy with our purchase. Ordered on line, fast delivery, and delivery and haul away old sets went very smoothly.

Review provided by Stearns & Foster

Reviewed On Oct 1, 2026
Sleepwell

Lower is Better

This review was collected as part of a promotion

Works well as a foundation and because it is the shorter version, my comforter fits better. It is also nice to be closer to the floor

Review provided by Stearns & Foster

Reviewed On Sep 27, 2026
Dawny

Great box spring.

This review was collected as part of a promotion

We chose the 5 inch as we are getting older and lowered our bed significantly. So easy to get in and out of bed.

Review provided by Stearns & Foster

Reviewed On Sep 14, 2026
Looking for help

I don’t know what the foundation has to do with the quality

This review was collected as part of a promotion

The foundation was purchased and installed at the same time as the mattress. Not getting good sleep

Review provided by Stearns & Foster

Reviewed On Aug 27, 2026