Beautyrest Black® L-Class Firm 13.75" Mattress


Beautyrest Black® L-Class Firm 13.75" Mattress

$1,949.00 $2,249.00 13% Off
Shipping calculated at checkout.

Size: Twin XL
  • Free Delivery in 2 - 4 Weeks*
Adjustable Base and Box Spring

Why Do Customers Love US-Mattress?

  • 120 Night In-Home Trial
  • Low Price Guarantee
  • Expert Customer Service
  • Family Owned and Operated


About the Beautyrest Black L-Class Firm Mattress

The Beautyrest Black® L-Class Extra Firm offers the firmest support in the lineup, boasting high-grade features at a more accessible price point. With a Comfort Scale score of 1, it delivers dense, extra firm support while still providing initial padding for lower back comfort. Its T3 Pocketed Coil system ensures superior contouring, minimal motion transfer, and long-term durability, compatible with adjustable bases. The BlackICE 4.0 system provides all-night cooling for deeper sleep, complemented by Beautyrest Gel Memory Foam for pressure relief and lasting comfort. Ideal for those seeking firm support without sacrificing comfort, this mattress combines luxury features with affordability, making it a top choice in the extra firm category.


  1. Antimicrobial Mattress Protection
  2. BlackICE 4.0
  3. SurfaceTouch Gel Memory Foam
  4. Firm Comfort Foam
  5. Beautyrest Gel Memory Foam
  6. Firm Comfort Foam
  7. T3 Pocketed Coil Technology
  8. Energy Foam
Read More About Product


  • Pressure Relief
    Pressure Relieving

    Incorporates a layer of conforming materials that mold to your body, offering appropriate support and alleviation.

  • Supportive

    Incorporates a support mechanism designed to adapt to your body's contours, promoting balanced weight distribution for optimal alignment.

  • Cooling Technology
    Cooling Technology

    Incorporates materials and elements engineered to regulate temperature by dispersing heat away from the body, ensuring a cool and comfortable sleep experience.

  • Breathable

    The breathable layers of this mattress promote cooler sleeping conditions, reducing the likelihood of waking up frequently during the night.

  • Motion Transfer
    Motion Transfer Reduction

    Motion isolation attributes aid in separating your partner's movements, such as tossing, turning, or shifting during sleep, promoting longer, uninterrupted rest for you.

  • Adjustable Base Friendly
    Adjustable Base Friendly

    This mattress is compatible with adjustable bases, which can raise your head and/or feet, easing snoring, sinus pressure, enhancing circulation, and providing numerous other health advantages.


Height: 13.75"

Comfort: Firm

Quilting Layer

Anti-Microbial Protection*

Comfort Layer

BlackICE™️ with Plant-Based Cooling Technology

3/4" SurfaceTouch™ Gel Memory Foam

1/2” Firm Comfort Foam

1” Beautyrest® Gel Memory Foam

2” Firm Comfort Foam

Support System

Zoned T3 Pocketed Coil® Technology

Works With All Bed Types

  • Box Spring

    Box Spring

  • Traditional Frames

    Traditional Frames

  • Adjustable Bases

    Adjustable Bases

  • Platform


Your mattress purchase is fully compatible with the selections shown above!

Build Your Perfect Sleep System

Adjustable Base
Adjustable Base
A sturdy adjustable base puts you in control of your sleep setup.
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The perfect pillow creates the ideal balance of softness and support.
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Mattress Protector
Mattress Protector
Keep your mattress safe from stains, water, and changing temperatures.
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