Beautyrest Black K-Class Ultra Plush Pillowtop Mattress Review

Updated May 19, 2022

Plush Pillow Top Full

Are you thinking about getting this top-of-the-line mattress from Beautyrest Black? The K-Class Ultra Plush Pillowtop has a high price of $4,299 (queen size.)  It's definitely a big-ticket item that needs to be researched, so we compiled our reviews and information on this bed so you can be more informed in your decision making:

Comfort Scale Rating

The K-Class Ultra Plush Pillowtop mattress has a super soft, luxurious feel; we rate it a 9 on our 10 point Comfort Scale (a 1 is hard, 10 is softest.) This mattress will appeal to you only if you like a super soft bed. If you like anything firmer than that, you need to consider another mattress. (For example, you like a firm feeling mattress.)

Expert Video Review

Here’s our quick K-Class Ultra Plush Pillowtop Video Review. It highlights the features, benefits, and our impression. 

VIDEO COMING SOON

Pros & Cons

PROS CONS
  • Premium materials and construction mean great support and lasting comfort
  • The layer of nano-coils near the surface increases durability and gives a contouring feel
  • Several layers of high-quality memory foams
  • Minimal motion transfer makes it easy to sleep with a restless partner
  • Softest of the soft for those who want to sleep on a cloud
  • Highest price model at $4,899 (queen-size)
  • Very tall mattress at 16". You can pair it with a low-profile foundation.
  • No twin size

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Pressure Test Results

We pressure tested the K-Class Ultra Plush Pillowtop mattress and will publish our results in the near future. We tested it 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.) 

When the results are published, I would expect it to show no pressure points because of all the comfort materials on this thick mattress. The thing to watch for will be how much support it has, but that should be good too because of the layer of nano-coils used in the bed.

Below is a sample of what a pressure test looks like. We'll update our review and let you know how it did.

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

BACK SLEEPER SIDE SLEEPER
LARGE PEOPLE Largest 10% of adults 210-273 lbs Large back sleeper heatmap Avg Pressure: mmHg - Area: inches2 Large side sleeper heatmap Avg Pressure: mmHg - Area: inches2
AVERAGE PEOPLE Middle 50% of adults 134-218 lbs Average back sleeper heatmap Avg Pressure: mmHg - Area: inches2 Average side sleeper heatmap Avg Pressure: mmHg - Area: inches2
PETITE PEOPLE Smallest 10% of adults 111-135 lbs Petite back sleeper heatmap Avg Pressure: mmHg - Area: inches2 Petite side sleeper heatmap Avg Pressure: mmHg - Area: inches2
BACK SLEEPER
LARGE PEOPLE Largest 10% of adults 210-273 lbs Large back sleeper heatmap Avg Pressure: mmHg - Area: inches2
AVERAGE PEOPLE Middle 50% of adults 134-218 lbs Average back sleeper heatmap Avg Pressure: mmHg - Area: inches2
PETITE PEOPLE Smallest 10% of adults 111-135 lbs Petite back sleeper heatmap Avg Pressure: mmHg - Area: inches2
SIDE SLEEPER
LARGE PEOPLE Largest 10% of adults 210-273 lbs Large side sleeper heatmap Avg Pressure: mmHg - Area: inches2
AVERAGE PEOPLE Middle 50% of adults 134-218 lbs Average side sleeper heatmap Avg Pressure: mmHg - Area: inches2
PETITE PEOPLE Smallest 10% of adults 111-135 lbs Petite side sleeper heatmap Avg Pressure: mmHg - Area: inches2

The Main Beautyrest Black K-Class Ultra Plush Pillowtop Features in Detail

k-class plush pillow top feature

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. AirFeel Foam

A soft, quality foam located at the surface, with an open cell structure that helps provide airflow, performance and durability for the life of the mattress.

4. 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.

5. AirCool Memory Foam

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

6. Alpaca, Cashmere and Silk Comfort Layer

This layer is 100% natural and will help wick away moisture and enhance the cooling features within the mattress.

7. Self Response Latex

Arguably the best comfort foam in mattresses, latex provides superior pressure relief for less tossing and turning while pushing back against the body for a more supportive feel. Anti-microbial and anti-dustmite properties contribute to a healthier sleep environment.

8. 2K Nano Coil

2000 micro coils provide enhanced conformability and pressure relief with individualized back support for each unique person.

9. 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.

10. 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 K-Class Plush Pillowtop mattress has SurfaceTouch Gel Memory Foam as well as Alpaca, Cashmere, and Silk Fibers in the comfort layers. You can compare the old model here.

Warranty

The K-Class Ultra Plush Pillowtop mattress has a 10-year warranty against factory defects.

Beautyrest Black K-Class FAQs

  1. What is new to the Beautyrest Black K-Class Ultra Plush Pillowtop mattress?

    The new models use SurfaceTouch Gel Memory Foam as well as Alpaca, Cashmere, and Silk Fibers in the comfort layers.  

  2. 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!

  3. Do I need to flip my Beautyrest Black K-Class mattress?

    No, Beautyrest Black 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.

Conclusion

The Black K-Class Ultra Plush Pillowtop mattress is a premium, super-soft feeling mattress. This mattress is really only intended for you if you happen to prefer a super soft mattress, and like to sink into the top of the bed. We carry another option if you like a firm feeling mattress.

This model is the top of the line for Beautyrest Black, which is the overall top-of-the-line brand for Simmons Beautyrest mattresses. It's loaded with features including its best-pocketed coil design, its best cooling materials (BlackICE with Plant-Based Cooling Technology), and a layer of nano coils. It also has generous layers of memory foams and gel memory foams that bring the total height to 16". 

This is a very tall mattress, so make sure you are ready for that. You should consider getting a low profile (short) foundation (4.5") rather than a regular size (9") to keep the overall height manageable.  

It is expensive so it's really aimed only at people with that kind of money to spend on a mattress. If you don't want to spend so much, consider their other lower-priced models. For those looking to find the softest, most premium mattress, this is the one for you.


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Beautyrest Black K-Class Ultra Plush Pillowtop Specifications:

Product Name
Queen Price

$4,299

Brand
Beautyrest Black
Mattress Comfort
Pillowtop
Comfort Scale Number
9
Coil Count
815
Coil Gauge
13.5
Height
16.5"
Comfort Padding Layers
Warranty
  • 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

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