Beautyrest Harmony Lux Carbon 1000 Extra Firm Mattress Review

Updated January 24, 2022

The Harmony Lux Carbon 1000 Extra Firm mattress is a very firm feeling bed in the Beautyrest Harmony Lux collection. It's part of the Carbon Series, which is less expensive than the other series in this collection, Diamond. It's sold by online retailers as the HLC 1000 Extra Firm. For further information on this bed, we go into detail in our review below:

Comfort Scale Rating

The Harmony Lux Carbon 1000 Extra Firm mattress is an extra firm bed; we rate it a 2 on our 10 point Comfort Scale (a 1 is hard, 10 is softest). This type of comfort is for those who know they prefer a very firm mattress. If you feel that a softer bed might suit your needs better then there are a couple of other Harmony Lux models that could work better for you than this model.

Overview of the Carbon 1000 Extra Firm

Here's our expert review video which highlights the features, benefits, and our impression of the mattress. 

Pros & Cons

PROS CONS
  • Partnership with SEAQUAL to reduce debris in the ocean
  • Edge support makes the entire surface sleepable
  • Premium pressure-relieving foams
  • Cooling technology
  • Minimal motion transfer
  • Adjustable base compatible
  • Very firm, won't appeal to anyone who likes a softer mattress
  • Not recommended for petite or average-sized sleepers
  • Not for those on a budget

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Pressure Test Results

We've pressure tested the Beautyrest Harmony Lux Carbon 1000 Extra Firm mattress to see if the bed provides good support, pressure relief, and comfort for large, medium, and petite-sized people. Using models of each size we map their bodies while lying down on their side and back sleeping positions for a clear image of how well this mattress will perform for most people. (Learn how we test.) 

From the results shown below, you can see that this firmer mattress is not recommended for petite or average-sized people. The firmness of this mattress will likely cause excessive pressure on your hips and shoulders leading to a disruptive night's sleep. As is the case with most firm mattresses, this bed performed fairly well for people with larger-sized bodies, scoring a 'Good' for both back sleepers and side sleepers.

EXAMPLE PRESSURE TEST RESULTS:

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

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The Main Harmony Lux Carbon 1000 Extra Firm Features in Detail

Harmony Lux Carbon 1000 Extra Firm Cutaway Image

  1. 1. InfiniCool Lux Technology

    The material in the quilt has cooling characteristics, preventing you from overheating throughout the night. 

  2. 2. RightTemp Wave Foam

    Provides exceptional pressure relief and comfort, preventing tossing and turning, so you can get deeper sleep.

  3. 3. T2 Pocketed Coil Technology

    The coils are individually wrapped, so they contour to the curves of your body providing precise support right where needed. 

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Comfort Depth Video

We will measure how far your hips and shoulders sink into the Beautyrest Harmony Lux Carbon 1000 Extra Firm mattress with different body types and post a video of our findings.

VIDEO COMING

Warranty

The Harmony Lux Carbon 1000 Extra Firm mattress has a 10-year warranty against factory defects.

Conclusion

The Harmony Lux Carbon 1000 Extra Firm mattress is an extra-firm bed from Simmons' Harmony Lux Collection. It's one of five available Harmony Lux Carbon Series models. There's also the Diamond Series, which is higher-end and has four models. This bed is sold by online retailers under the name HLC 1000 Extra Firm.

It's a great option for anyone who likes a firm bed. It provides decent pressure relief, even with the firm feel, but only for people with larger bodies. It has high-quality foams and an individually wrapped coil system, so it'll contour well. It'll also give good back support, thanks to the alternating coil in the center third of the mattress. We'll test this out with our pressure testing as soon as we can get the beds to our facility, and then I'll provide more detail.

It'll only suit those who like a firm bed, but it's a good price for some really high-quality materials and features, so I'd only recommend the Carbon 1000 Extra Firm to those who prefer this comfort. It has great edge support that we see on other Beautyrest models, and the construction will minimize motion transfer, so I'd also recommend this as a good bed for couples (as long as they agree on a firm feel).

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Other Comfort Options

If you like the Beautyrest Harmony Lux Carbon 1000 collection, but would rather have it in a different comfort level, check out the other options below.

Beautyrest Harmony Lux Carbon 1000 Extra Firm Specifications:

  • 210-273 lbs
Product Name
Queen Price

$1,399 [Check Sale]

Brand
Simmons
Mattress Comfort Extra Firm
Comfort Scale Number
2
Coil Count
TBA
Coil Gauge
TBA
Height
12.5"
Comfort Padding Layers
  • 1" RightTemp Wave Foam
  • 1/2" Firm Comfort Foam
  • 1/2" Beautyrest Gel Memory Foam
  • 1" Firm Comfort Foam
Warranty
  • 10-year warranty against manufacturer's defects
  • No Flip, No Rotate
  • Non-prorated
Back Support System
  • T2 Pocketed Coil Technology
  • 1 1/2" Energy Foam
Quilt Top of Mattress
  • InfiniCool Lux
Edge Support
Recommended For Side Sleepers Who Weigh
  • 210-273 lbs
Recommended For Back Sleepers Who Weigh
  • 210-273 lbs

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About The Author, Juliana

Juliana Huhta is a digital content analyst who has taken a deep dive into the mattress industry. She spends her free time hanging out with her friends (read: her cats), and trying to get creative with some painting or sewing.