Beautyrest Black K-Class Ultra Plush Pillowtop Mattress Review

Updated June 11, 2024

Beautyrest Black K Class Ultra Plush pillow top mattress in a midcentury modern room

Are you thinking about getting this top-of-the-line mattress from Beautyrest Black? The K-Class Ultra Plush Pillowtop is 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 soft, luxurious feel; we rate it a 7 on our 10 point Comfort Scale (a 1 is hard, 10 is softest.) This mattress will appeal to you only if you like a pretty soft bed. If you like anything firmer than that, you need to consider another mattress.

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 priced model in the lineup
  • Very tall mattress at 16". You can pair it with a low-profile foundation.
  • No twin size

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

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.


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. 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.


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

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.