Beautyrest Black L-Class Firm Mattress Review

Updated November 20, 2023

L Class Firm mattress  on a black platform base in a bedroom with different tones of wood

The Beautyrest Black L-Class Firm is the lowest price Beautyrest Black mattress. While it's very firm, it does offer the best price to get a bed from this luxury brand. We've studied the mattress and summarized our review for you below:

Comfort Scale Rating

The L-Class Firm mattress is a firm bed that we rate 1 on our 10-point Comfort Scale (a 1 is hard, 10 is softest.) This mattress will only appeal to you if you like a very firm mattress, anyone who feels that a softer comfort would better meet their needs can consider one of the other L-Class models, they are available in many comfort types.

Expert Video Review

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


Pros & Cons

  • Premium materials and construction

  • BlackICE 4.0 provides a cool night of sleep

  • Zoned T3 Pocketed Coil Technology provides excellent back support

  • Beautyrest is a trusted brand

  • It'll only appeal if you like a very firm bed

  • Not recommended for heavy side sleepers

  • No twin size 

Shop Now

Pressure Test Results

The L-Class Firm 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.) 

Not surprisingly (because this is an extra firm mattress) this bed exhibited multiple excessive pressure points on some of the bodies, particularly in the side sleeping position while testing.  As you can see in the images below there are good-sized areas of red and yellow on the shoulders and hips of the larger and average-sized bodies. 

How we can tell that is by interpreting the colors shown in the images where red shows excessive amounts of pressure and yellow demonstrates an increase in pressure.  Ideally, we want to see large areas of green and light blue which show you where the bed is giving that person great pressure relief and back support. 

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 L-Class Firm Features in Detail

Beautyrest Black 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. SurfaceTouch Gel Memory Foam

SurfaceTouch Gel Memory Foam is sewn into the quilt to work directly under the sleep surface to quickly unlock advanced pressure point relief from the moment you lie down.

4. Firm Comfort Foam

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

5. Beautyrest Gel Memory Foam

Experience exceptional pressure relief with Beautyrest Gel Memory foam that contours to your body.

6. Firm Comfort Foam

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

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.

New Features

Compared to the old model, the new L-Class Firm has added antimicrobial mattress protection and SurfaceTouch Gel Memory Foam.


The L-Class Extra Firm mattress has a 10-year warranty against factory defects.

Beautyrest Black L-Class FAQs

  1. How does the 120-night trial work?

    With the 120-night trial, try the mattress for at least 30 days, and up to 120 nights. If you're not satisfied, you can replace it. All you'll have to pay is a $139 processing fee, shipping and delivery are covered!

  2. How is this L-Class mattress constructed?

    This mattress has a traditional innerspring mattress construction and is built upon a Zoned T3 Pocketed Coil design.

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

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


The Black L-Class Firm mattress is a very firm-feeling bed so it'll only appeal to you if you prefer a firmer bed.  It's the cheapest Beautyrest Black mattress, so it's a relatively good value from this Collection.

Since the mattress is very firm, you should only consider this model if you like harder beds, or if you like sleeping on your stomach (firmer beds are best for stomach sleepers.)  This mattress is not recommedned for side sleepers or back sleepers, particularly larger-sized people.

The bed has premium features like the BlackICE with Plant-Based Cooling Technology that help to keep the bed cool.  It also has a Zoned T3 Pocketed Coil design which is a variable stage coil to give increasing support under the heaviest part of your body.  And even though this model is firmer, it does have several layers of conforming and supportive foams.  So if you like a firmer bed and want luxury features, this model is one to give serious consideration.

Shop Now

Other Comfort Options

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

Beautyrest Black L-Class Firm Specifications:

Product Name
Beautyrest Black L-Class Firm Mattress
Queen Price
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.