Mattress
Products
In The Lab
Forums
Newsletters
Join now
Best
Mattresses Side Sleepers Back Pain Memory Foam Brands King Size Firm Heavy People Hybrid Mattresses-In-A-Box Affordable Queen Cooling Organic Twin Latex Full-Size Medium Firm California King Twin XL
Tools
Compare Results Table Tool Review List Review Index Graph Review Pipeline Vote Custom Ratings
Popular
Casper Snow Helix Midnight Luxe 2025 Kirkland Stearns & Foster Pillow Top Lakeridge Casper Cooling Select Novaform Legacy Avocado Green Saatva Classic (Luxury Firm) Allswell Hybrid Saatva Latex Hybrid Sealy Posturepedic Pro Highland Manor Tempur-Pedic TEMPUR-Adapt Novaform ComfortGrande Plus Sleep On Latex Hybrid Brooklyn Bedding Signature Hybrid Helix Midnight Elite Saatva Classic (Plush Soft) Beautyrest Mattress Beautyrest Black Silk & Snow Mattress Stearns & Foster Lux Estate
70 Mattresses bought and tested
Supported by you via membership, and when you purchase through links on our site, we may earn an affiliate commission.
  1. Home
  2. Mattress
  3. Compare

Beautyrest Black vs Harmony Lux

Which Mattress Is Better?

    Top
    Main Differences
    Design
      Style
    Performance
      FirmnessBody ConformitySupportBouncinessComfort Layers EnvelopmentResponsivenessMotion IsolationEdge SupportCooling
    Components
      CoverEdge ConstructionFoam Layer MaterialFoam Layer Mass DensityFoam Layer ThicknessSpring Layer DimensionsFoam Layer FirmnessSpring Layer FirmnessFoam Layer ResilienceSpring Layer Bounciness
    Comments

Products

Beautyrest Black
Beautyrest Harmony Lux

Tested using Methodology v1.2

Updated Jul 30, 2026 04:47 PM

SEE PRICE
Beautyrest

Tested using Methodology v1.2

Updated Mar 05, 2026 06:12 PM

SEE PRICE
Amazon
Beautyrest Black Picture

Track

Beautyrest Harmony Lux Picture

Track

Mattress Type
Hybrid
Bed-In-A-Box
No
Upper Comfort Foam @ LumbarMemory Foam
Firmness Level
Medium (44 Pa/mm)
Mattress Type
Hybrid
Bed-In-A-Box
No
Upper Comfort Foam @ LumbarPolyfoam
Firmness Level
Medium (47 Pa/mm)
  1. Recommended in 1 article:
  2. King Size

Our Verdict

Beautyrest Black

Beautyrest Harmony Lux

The Beautyrest Black and Beautyrest Harmony Lux have different strengths. The Beautyrest Black is a more durable mattress with better body conformity, so it provides more pressure relief for side sleepers. However, if it works for your sleeping position and body type, the Lux provides better motion isolation, cooling, and edge support.

GIFT THIS COMPARISON

0 

Variants

  • Black (Series Three/Medium) (Full)
  • Black (Series Three/Medium) (Queen)
  • Harmony Lux (Queen (Anchor Island/Medium Pillow Top))

Review

See Beautyrest Black Review
See Beautyrest Harmony Lux Review
0 
0 

Check Price

Full
Black (Series Three/Medium)
SEE PRICE
Amazon
 
Queen
Black (Series Three/Medium)
SEE PRICE
Beautyrest
 
 
Queen (Anchor Island/Medium Pillow Top)
Harmony Lux
SEE PRICE
Amazon

Main Differences for
Side Sleeping

Threshold 

0.10

Side Sleeping 
 

8.0
7.8
No major differences between these mattresses for side sleeping. See full list of tests below.

Full Comparison

Design

Style 
 

Style Picture 
 

Compare High-Res
Beautyrest Black Style Picture
Compare High-Res
Beautyrest Harmony Lux Style Picture

Mattress Type 
 

Hybrid
Hybrid

Bed-In-A-Box 
 

No
No

Quilted Top Layer 
 

Yes
Yes

Grab Handles 
 

Yes
Yes

Thickness  

38.5 cm (15.2")
38.9 cm (15.3")
Performance

Firmness 
 

Head/Feet Firmness  

 Preview Graph
Beautyrest Black Head/Feet Firmness
 Preview Graph
Beautyrest Harmony Lux Head/Feet Firmness
 Compare in Graph Tool

Lumbar Firmness  

 Preview Graph
Beautyrest Black Lumbar Firmness
 Preview Graph
Beautyrest Harmony Lux Lumbar Firmness
 Compare in Graph Tool

Firmness Video  

Normalized Stiffness @ Head/Feet 
 

46 Pa/mm
45 Pa/mm

Normalized Stiffness @ Lumbar 
 

44 Pa/mm
47 Pa/mm

Firmness Level 
 

Medium (44 Pa/mm)
Medium (47 Pa/mm)

Body Conformity 
 

8.2
7.8

Shoulder Indentation vs. Body Weight  

 Preview Graph
Beautyrest Black Shoulder Indentation vs. Body Weight
 Preview Graph
Beautyrest Harmony Lux Shoulder Indentation vs. Body Weight
 Compare in Graph Tool

Body Conformity Picture  

Indent @ 50 kg (110 lb) 
 

56 mm (2.2")
47 mm (1.8")

Indent @ 80 kg (176 lb) 
 

79 mm (3.1")
73 mm (2.9")

Indent @ 110 kg (242 lb) 
 

100 mm (3.9")
95 mm (3.8")

Support 
 

7.0
7.1

Pelvis Indentation vs. Body Weight  

 Preview Graph
Beautyrest Black Pelvis Indentation vs. Body Weight
 Preview Graph
Beautyrest Harmony Lux Pelvis Indentation vs. Body Weight
 Compare in Graph Tool

Indent Difference @ 50 kg (110 lb) 
 

15 mm (0.6")
14 mm (0.5")

Indent Difference @ 80 kg (176 lb) 
 

22 mm (0.9")
22 mm (0.8")

Indent Difference @ 110 kg (242 lb) 
 

28 mm (1.1")
26 mm (1.0")

Bounciness 
 

7.8
7.6

Bounciness Video  

Maximum Rebound Height 
 

18.0 cm (7.1")
16.5 cm (6.5")

Comfort Layers Envelopment 
 

7.4
8.4

Sinking & Contouring Picture 
 

Compare High-Res
Beautyrest Black Sinking & Contouring Picture
Compare High-Res
Beautyrest Harmony Lux Sinking & Contouring Picture

Sinking Depth 
 

4.9 cm (1.9")
5.7 cm (2.3")

Diameter Of Distortion 
 

28.0 cm (11.0")
26.3 cm (10.4")

Responsiveness 
 

8.9
9.1

Responsiveness Video  

Response Time 
 

0.6 s
0.5 s

Motion Isolation 
 

7.7
8.2

Motion Isolation Video  

Head/Feet Motion Isolation  

 Preview Graph
Beautyrest Black Head/Feet Motion Isolation
 Preview Graph
Beautyrest Harmony Lux Head/Feet Motion Isolation
 Compare in Graph Tool

Lumbar Motion Isolation  

 Preview Graph
Beautyrest Black Lumbar Motion Isolation
 Preview Graph
Beautyrest Harmony Lux Lumbar Motion Isolation
 Compare in Graph Tool

Peak Acceleration @ Head/Feet 
 

2.19 g
2.84 g

Dissipation Time @ Head/Feet 
 

0.57 s
0.43 s

Peak Acceleration @ Lumbar 
 

2.53 g
1.96 g

Dissipation Time @ Lumbar 
 

0.62 s
0.47 s

Edge Support 
 

8.5
9.1

Naturalistic Loading Pad Video  

Naturalistic Loading Pad  

 Preview Graph
Beautyrest Black Naturalistic Loading Pad
 Preview Graph
Beautyrest Harmony Lux Naturalistic Loading Pad
 Compare in Graph Tool

Small Platen  

 Preview Graph
Beautyrest Black Small Platen
 Preview Graph
Beautyrest Harmony Lux Small Platen
 Compare in Graph Tool

Naturalistic Loading Pad Indentation 
 

139 mm
125 mm

Small Platen Indentation @ 0 mm From Edge 
 

149 mm
144 mm

Small Platen Indentation @ 150 mm From Edge 
 

137 mm
133 mm

Increased Indentation @ Mattress Edge 
 

12 mm
11 mm

Cooling 
 

7.4
8.0

Cooling Graph  

 Preview Graph
Beautyrest Black Cooling Graph
 Preview Graph
Beautyrest Harmony Lux Cooling Graph
 Compare in Graph Tool

Energy Transferred Over 1st Hour 
 

57 kJ
71 kJ

Energy Transferred Over 8 Hours 
 

155 kJ
159 kJ
Components

Cover 
 

Cover Picture 
 

Compare High-Res
Beautyrest Black Cover Picture
Compare High-Res
Beautyrest Harmony Lux Cover Picture

Sleeping Surface Material 
 

Not Provided by Manufacturer
Not Provided by Manufacturer

Removable 
 

No
No

Machine Washable 
 

No
No

Edge Construction 
 

Edge Support Picture 
 

Compare High-Res
Beautyrest Black Edge Support Picture
Compare High-Res
Beautyrest Harmony Lux Edge Support Picture

Edge Component 
 

Polyfoam
Polyfoam

Foam Layer Material 
 

Foam Layer Material Picture 
 

Compare High-Res
Beautyrest Black Foam Layer Material Picture
Compare High-Res
Beautyrest Harmony Lux Foam Layer Material Picture

Quilted Top Fill  

Polyfoam + Fiber Fill
Polyfoam + Fiber Fill

Upper Comfort Foam @ Head/Feet  

Memory Foam
Polyfoam

Upper Comfort Foam @ Lumbar  

Memory Foam
Polyfoam

Lower Comfort Foam @ Head/Feet  

Latex
Memory Foam

Lower Comfort Foam @ Lumbar  

Latex
Memory Foam

Transition Foam  

Polyfoam
Polyfoam

Support Foam  

N/A
N/A

Foam Layer Mass Density 
 

6.8
3.0

Quilted Top Fill  

24 kg/m³ (1.5 lb/cu.ft.)
18 kg/m³ (1.1 lb/cu.ft.)

Quilted Top Fill Foam Density vs. Reference 
 

0.6
0.3

Upper Comfort Foam @ Head/Feet  

47 kg/m³ (3.0 lb/cu.ft.)
23 kg/m³ (1.4 lb/cu.ft.)

Upper Comfort Foam @ Head/Feet Density vs. Reference 
 

0.7
0.6

Upper Comfort Foam @ Lumbar  

47 kg/m³ (2.9 lb/cu.ft.)
23 kg/m³ (1.4 lb/cu.ft.)

Upper Comfort Foam @ Lumbar Density vs. Reference 
 

0.7
0.6

Lower Comfort Foam @ Head/Feet  

83 kg/m³ (5.2 lb/cu.ft.)
28 kg/m³ (1.7 lb/cu.ft.)

Lower Comfort Foam @ Head/Feet Density vs. Reference 
 

1.8
0.4

Lower Comfort Foam @ Lumbar  

83 kg/m³ (5.2 lb/cu.ft.)
28 kg/m³ (1.7 lb/cu.ft.)

Lower Comfort Foam @ Lumbar Density vs. Reference 
 

1.8
0.4

Transition Foam  

29 kg/m³ (1.8 lb/cu.ft.)
18 kg/m³ (1.1 lb/cu.ft.)

Transition Foam Density vs. Reference 
 

0.9
0.3

Support Foam  

N/A
N/A

Support Foam Density vs Reference 
 

N/A
N/A

Foam Layer Thickness 
 

Foam Layer Thickness Picture 
 

Compare High-Res
Beautyrest Black Foam Layer Thickness Picture
Compare High-Res
Beautyrest Harmony Lux Foam Layer Thickness Picture

Quilted Top 
 

8.0 cm (3.1")
7.0 cm (2.8")

Upper Comfort Foam @ Head/Feet  

1.3 cm (0.5")
4.9 cm (1.9")

Upper Comfort Foam @ Lumbar  

1.3 cm (0.5")
4.9 cm (1.9")

Lower Comfort Foam @ Head/Feet  

4.0 cm (1.6")
1.0 cm (0.4")

Lower Comfort Foam @ Lumbar  

4.0 cm (1.6")
1.0 cm (0.4")

Transition Foam  

3.8 cm (1.5")
2.1 cm (0.8")

Support Foam  

N/A
N/A

Spring Layer Dimensions 
 

Spring Layer Height Picture 
 

Compare High-Res
Beautyrest Black Spring Layer Height Picture
Compare High-Res
Beautyrest Harmony Lux Spring Layer Height Picture

Spring Layer Density Picture 
 

Compare High-Res
Beautyrest Black Spring Layer Density Picture
Compare High-Res
Beautyrest Harmony Lux Spring Layer Density Picture

Comfort Layer Height 
 

N/A
N/A

Comfort Layer Coil Density 
 

N/A
N/A

Comfort Layer Coil Gauge 
 

N/A
N/A

Support Layer Height 
 

21.0 cm (8.3")
21.2 cm (8.3")

Support Layer Coil Density 
 

268 coils/m² (25 coils/ft²)
293 coils/m² (27 coils/ft²)

Support Layer Coil Gauge @ Head/Feet 
 

12 gauge
11 gauge

Support Layer Coil Gauge @ Lumbar 
 

12 gauge
11 gauge

Foam Layer Firmness 
 

Comfort Layer IPD  

 Preview Graph
Beautyrest Black Comfort Layer IPD
 Preview Graph
Beautyrest Harmony Lux Comfort Layer IPD
 Compare in Graph Tool

Transition & Support Layer IPD  

 Preview Graph
Beautyrest Black Transition & Support Layer IPD
 Preview Graph
Beautyrest Harmony Lux Transition & Support Layer IPD
 Compare in Graph Tool

Quilted Top Fill 25% IPD 
 

1.4 kPa
1.8 kPa

Upper Comfort Foam @ Head/Feet 25% IPD 
 

1.5 kPa
3.1 kPa

Upper Comfort Foam @ Lumbar 25% IPD 
 

1.5 kPa
3.1 kPa

Lower Comfort Foam @ Head/Feet 25% IPD 
 

2.8 kPa
1.9 kPa

Lower Comfort Foam @ Lumbar 25% IPD 
 

2.8 kPa
1.9 kPa

Transition Foam 25% IPD 
 

3.1 kPa
4.1 kPa

Support Foam 25% IPD 
 

N/A
N/A

Spring Layer Firmness 
 

Comfort Layer Firmness  

Beautyrest Black Comfort Layer Firmness
Beautyrest Harmony Lux Comfort Layer Firmness
 Compare in Graph Tool

Support Layer Firmness  

 Preview Graph
Beautyrest Black Support Layer Firmness
 Preview Graph
Beautyrest Harmony Lux Support Layer Firmness
 Compare in Graph Tool

Spring Layer Firmness  

Normalized Comfort Layer Stiffness @ Head/Feet 
 

N/A
N/A

Normalized Comfort Layer Stiffness @ Lumbar 
 

N/A
N/A

Normalized Support Layer Stiffness @ Head/Feet 
 

69 Pa/mm
67 Pa/mm

Normalized Support Layer Stiffness @ Lumbar 
 

69 Pa/mm
59 Pa/mm

Foam Layer Resilience 
 

Foam Layer Resilience Video  

Quilted Top Fill  

30%
34%

Upper Comfort Foam @ Head/Feet  

2%
49%

Upper Comfort Foam @ Lumbar  

2%
49%

Lower Comfort Foam @ Head/Feet  

58%
25%

Lower Comfort Foam @ Lumbar  

58%
25%

Transition Foam  

48%
39%

Support Foam  

N/A
0%

Spring Layer Bounciness 
 

Comfort Spring Layer Bounciness Video  

Support Spring Layer Bounciness Video  

Comfort Spring Layer Maximum Rebound Height 
 

N/A
N/A

Support Spring Layer Maximum Rebound Height 
 

53.0 cm (20.9")
43.0 cm (16.9")

Check Price

Full
Black (Series Three/Medium)
SEE PRICE
Amazon
 
Queen
Black (Series Three/Medium)
SEE PRICE
Beautyrest
 
 
Queen (Anchor Island/Medium Pillow Top)
Harmony Lux
SEE PRICE
Amazon
Back to Top

Beautyrest Black

Beautyrest Harmony Lux

Comments

  1. Comparison
 • Posted 2 days ago

Beautyrest Black vs Beautyrest Harmony Lux: Main Discussion

What do you think of these products? Let us know below.


Looking for a personalized buying advice from the RTINGS.com experts? Members have direct access to buying advice on our member forum.

See All Home Discussions
 Share
0 
PreviewBack to editorFormat guide
No comments yet, refresh to see new ones
We make money directly from you via Membership (which gives you access to extra features), when you buy from the RTINGS.com Shop , and when you buy a product after clicking a link to a retailer. Learn more about how we work.
We buy our own products, just like you, mostly from the United States. When a product is discontinued or no longer popular, we sell the review units locally. See what products we currently have for sale.
© 2026 9298-5266 Quebec Inc. All Rights Reserved.