Beautyrest Black Hybrid LX-Class Firm Mattress Review

Updated November 13, 2022

Woman sitting on the edge of a Beautyrest Black mattress putting on her shoes

The Beautyrest Black Hybrid LX-Class Firm is the firmest-feeling Beautyrest Black model of the three LX Class mattresses by Simmons. If you're considering this model as your next bed, please continue reading our expert review for all the information you need to aid in your decision-making.

Comfort Scale Rating

The Black X Class Firm mattress is rated a 3 on our 10 point Comfort Scale (a 1 is hard, 10 is softest).  If your comfort preference is a firm-feeling bed then this model may be a good fit for you. However, if you prefer a softer feel, you might want to look at one of the softer LX-Class models. 

Expert Video Review

Here’s our quick LX-Class Firm Mattress Video Review. It highlights the features, benefits, and our impression. 


Pros & Cons

  • The LX-Class Firm is highly recommended for back sleepers of all body sizes
  • The hybrid construction is a very popular mattress type, offering the benefits of both a coil system and memory foam
  • There are several layers of premium memory foams providing comfort and support
  • The T3 Pocketed Coil technology is an excellent coil system exclusive to Beautyrest Black
  • A mattress this firm will not appeal to those who like to sink into their bed 
  • No twin size
  • Expensive, reasonable for what it offers, but out of reach for many people

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Pressure Test Results

We have not been able to test the new version of this mattress yet, so we are displaying the results from the previous model. We will update the review once we have the new testing done. It will likely have similar results, if a bit improved with the addition of gel memory foam that's been added to the LX-Class Firm.

So that you can read these test results you'll need to know what each color shown represents.

  • The red areas, as seen on the side sleeper with a larger-sized body, mean that there's a lot of pressure on that joint which will lead to tossing and turning for a very disturbed night's sleep. 
  • The yellow areas show where there's an increase in pressure, though not so much that the bed would very uncomfortable. 
  • The green areas show you where the pressure relief is good for that part of the body while light blue areas indicate appropriate back support.

I hope this helps you in your decision-making process if you're tossing around the idea of purchasing this model.

LARGE PEOPLELargest 10% of adults 210-273 lbs Large back sleeper heatmapAvg Pressure:   mmHg - Area:   inches2 Large side sleeper heatmapAvg Pressure:   mmHg - Area:   inches2
AVERAGE PEOPLEMiddle 50% of adults 134-218 lbs Average back sleeper heatmapAvg Pressure:   mmHg - Area:   inches2 Average side sleeper heatmapAvg Pressure:   mmHg - Area:   inches2
PETITE PEOPLESmallest 10% of adults 111-135 lbs Petite back sleeper heatmapAvg Pressure:   mmHg - Area:   inches2 Petite side sleeper heatmapAvg Pressure:   mmHg - Area:   inches2

The Main Beautyrest Black Hybrid LX-Class Firm Features in Detail

LX-Class Firm features

1. Antimicrobial Mattress Protection

Keeps mattress fresh and clean from odor causing bacteria.

2. BlackICE 4.0 with Plant-Based Cooling Technology

Cooling materials just beneath the surface enhance heat dissipation that help provide up to 18% more cooling power to keep you comfortable while you sleep.

3. AirCool Memory Foam

This proprietary memory foam conforms to your body, provides pressure point relief, and freedom of movement.

4. HD Memory Foam

Experience the perfect combination of comfort and support with HD memory foam. This high density memory foam conforms and contours to your body for personalized support.

5. Firm Comfort Foam

High quality comfort foams in different levels of plushness used in various constructions to create comfort preferences.

6. GelTouch Memory Foam

Provides advanced pressure relief which contours to your body for personalized support no matter your sleep position.

7. T3 Pocketed Coil Technology

Exclusive to Beautyrest Black, this coil works to provide individualized back support, ease of movement, and pressure point relief throughout the night.

8. Energy Foam

This durable foam utilized below the coil unit helps create a supportive, durable foundation for the no-flip mattress design.

Comfort Depth Video

We measured how far your hips and shoulders sink into the Hybrid LX-Class Firm mattress with different body types.

Aaron's Comfort View


Richard's Comfort View


Andrew's Comfort View



The Beautyrest Black Hybrid LX-Class Firm mattress has a 10-year warranty against factory defects.

Beautyrest Black X-Class FAQs

  1. Do I need to flip my Beautyrest Black X-Class mattress?

    No, Beautyrest Black X-Class beds are built from the ground up and are not designed to be flipped. This has become the new standard for mattresses today. It often means more comfort materials can be packed in.

  2. How is this X-Class mattress constructed?

    The Hybrid X-Class Collection has a traditional innerspring, the Zoned T3 Pocketed Coil, combined with multiple layers of memory foams which is what makes these beds a hybrid.

  3. Can I finance my Beautyrest Black X-Class mattress?

    Yes! You can finance a Beautyrest Black X-Class mattress on US-Mattress with Synchrony HOME, Affirm, or Paypal.


The Beautyrest Black Hybrid LX Class Firm mattress is the firmest feeling of the three LX Class models offered by Simmons. If you're shopping for this firm feeling (not hard!) mattress then you need to be aware that you're getting the firmest of all LX Class models. For anyone who thinks that a softer feeling mattress would be a better choice for them, there are two other LX Class models that are all softer than this one.

This mattress uses Firm Support Foam combined with the Zoned T3 Pocketed Coil System to give you a firmer feeling bed. This LX Class model has AirCool Memory Foam, which is arguably one of the best comfort foams in current bedding technology.

The LX-Class Firm mattress is one of the more expensive Beautyrest Black models currently available. However, this bed is loaded with premium materials and is a very high-quality construction. I would recommend this bed to anyone who wants one of the best firm-feeling beds. It's certainly a great value for the number of premium materials you get. Be warned though, a firm feeling bed like this is not for everyone, particularly side sleepers.

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Other Comfort Options

If you like the Beautyrest Black Hybrid LX-Class collection, but would rather have it in a different comfort level, check out the other options below.

Beautyrest Black Hybrid LX-Class Firm Specifications:

Product Name

Beautyrest Black Hybrid LX-Class Firm Mattress


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Mattress Comfort


Comfort Scale Number


Coil Count (Queen)


Coil Gauge




Comfort Padding Layers


  • 10 Year Manufacturer Warranty Included

Back Support System

Quilt Top of Mattress

Edge Support

Recommended For Side Sleepers Who Weigh

  • Coming Soon!

Recommended For Back Sleepers Who Weigh

  • Coming Soon!

About the Author Steven Bieber

Features Steven, a white man with glasses, smiling

Steven is a content writer who recently broke into the mattress industry. In his free time, he enjoys watching football and listening to music.