Beautyrest Black Hybrid LX-Class Medium Mattress Review

Updated October 28, 2022

This Beautyrest Black mattress against a gray wall with light gray bedding

The Beautyrest Black LX-Class Medium is a medium-feeling mattress slightly on the firmer side made by Simmons. It comes highly recommended for its back support and pressure relief. This model is the middle comfort of the three LX Class hybrid models in the Beautyrest Black collection.  We've reviewed this bed's features and benefits, please read on for our expert review:

Comfort Scale Rating

The LX Class Medium mattress is rated a 4 on our 10 point Comfort Scale (a 1 is hard, 10 is softest).  Most people will find a mattress with this level of comfort very appealing. However, if you feel that your comfort preference is a bed that is either much firmer or very soft then you may want to consider one of the other three LX Class models with a different comfort level. 

Expert Video Review

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


Pros & Cons

  • Medium feeling comfort is appealing to most people
  • Hybrid construction is a very popular mattress construction style
  • Highly recommended for back sleepers 
  • Several layers of premium Memory Foams 
  • T3 Pocketed Coil System, exclusive to Beautyrest Black 
  • Comfort might not appeal if you prefer a very firm or very soft feeling bed 
  • Memory foams can smell odd for a short while before it dissipates completely
  • No twin size 

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Pressure Test Results

The Hybrid LX-Class Medium mattress was tested with petite, average, and large body size people on their side and back sleeping positions to see what kind of support and comfort you can expect. (Learn how we test.) 

Our pressure test results show that this mattress is recommended for back sleepers of all body sizes and petite side sleepers.  The only 'not recommended' score that this bed earned was for the larger-sized body side sleeper which is due to the increase of excess pressure on the peak pressure points, the shoulder, and the hip.  If you consider the images below, the bright red areas that are highlighted in the larger side sleeper exhibit where there's too much pressure on that particular joint.

The yellow areas in these images indicate where there's a rise in pressure above what is considered normal, or acceptable.  What you really want to see are vast areas of green and light blue which means that the body is getting the exact amount of back support and pressure relief necessary for a good night's sleep

Your body needs proper back support for correct spinal alignment.  Without correct alignment, you'll likely experience head and neck pain, lower back discomfort, stiffness, and extreme weariness the next day all due to low-quality sleep from improper spinal alignment.  Pressure relief in your mattress is just as important because excess pressure on your hips and shoulders can cause numb limbs which makes you roll around in bed to find a more comfortable position.  This then disrupts your sleep and makes for a pretty miserable sleep experience.  The LX-Class Medium tested fairly well for proper back support and good pressure relief, particularly for back sleepers. 

The pressure test results for this mattress are not yet available but it will be available soon.  Below is just an example.

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 Medium Features in Detail

LX class Medium 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

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. 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.

6. Energy Foam

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


The Beautyrest Black LX-Class Medium 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 foam 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 Black Hybrid LX Class Medium mattress is a medium-feeling bed by Simmons.  This comfort is popular because it makes a great compromise for couples who have different sleep preferences.  There are other comforts in the LX-Class models if you feel that something softer or firmer might be your preference though.

One of these mattresses' main features is the AirCool Memory Foam infused into the mattress which helps air movement while being very soft and durable.  BlackICE Hybrid Technology is another feature that gives you a cooling sensation that also works to keep you cooler at night.  The multiple layers of foam combined with the T3 Pocketed Coil Technology create comfort and conforming support.  Our pressure testing has confirmed that this mattress performs particularly well for back sleepers with its excellent back support for proper spine alignment.  

The cost for one of these beds is the middle price of the three LX Class models. This model is a great choice for a Beautyrest Black model, so long as you're willing to pay for premium quality.I recommend this bed to anyone looking for a premium quality mattress, particularly if you're a back sleeper.

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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 LX-Class Medium Specifications:

Product Name

Beautyrest Black Hybrid LX-Class Medium Mattress

Mattress Comfort
Comfort Scale Number
Coil Count
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.