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  1. Home
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  3. Compare

Sleep On Latex Pure Green Organic vs Plank Firm Luxe

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

Sleep On Latex Pure Green Organic
Plank Firm Luxe

Tested using Methodology v1.2

Updated Apr 03, 2026 05:13 PM

SEE PRICE
Amazon.com

Tested using Methodology v1.2

Updated Apr 01, 2026 08:51 PM

SEE PRICE
Amazon.com
Sleep On Latex Pure Green Organic Picture

Track

Plank Firm Luxe Picture

Track

Mattress Type
Foam
Bed-In-A-Box
Yes
Upper Comfort Foam @ LumbarLatex
Firmness Level
Firm (81 Pa/mm)
Mattress Type
Hybrid
Bed-In-A-Box
Yes
Upper Comfort Foam @ LumbarPolyfoam
Firmness Level
Firm (66 Pa/mm)
  1. Recommended in 4 articles:
  2. Mattresses
  3. Firm
  4. Heavy People
  5. 1

Our Verdict

Sleep On Latex Pure Green Organic

Plank Firm Luxe

The Sleep On Latex Pure Green Organic and the Plank Firm Luxe have different strengths. Both are Firm mattresses well-suited for back/stomach sleeping, but the Sleep On Latex is more supportive regardless of your weight. It's made of more durable materials and is much more cooling. That said, the Plank Firm has a plusher feel that makes it better for side sleepers in the heavier weight category. You might also prefer it if you sleep with a partner because of its significantly better motion isolation. The Plank is also a flippable mattress, so you have the option to use the 'Extra Firm' side. 

GIFT THIS COMPARISON

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Variants

  • Pure Green Organic (Queen (Medium))
  • Firm Luxe (Queen)

Review

See Sleep On Latex Pure Green Organic Review
See Plank Firm Luxe Review
4 
0 

Check Price

 
Queen
Firm Luxe
SEE PRICE
Amazon.com
Queen (Medium)
Pure Green Organic
SEE PRICE
Amazon.com
 

Main Differences for
Side Sleeping

Threshold 

0.10

Side Sleeping 
 

6.4
6.5
No major differences between these mattresses for side sleeping. See full list of tests below.

Full Comparison

Design

Style 
 

Style Picture 
 

Compare High-Res
Sleep On Latex Pure Green Organic Style Picture
Compare High-Res
Plank Firm Luxe Style Picture

Mattress Type 
 

Foam
Hybrid

Bed-In-A-Box 
 

Yes
Yes

Quilted Top Layer 
 

No
Yes

Grab Handles 
 

No
No

Thickness  

19.2 cm (7.6")
34.9 cm (13.7")
Performance

Firmness 
 

Head/Feet Firmness  

 Preview Graph
Sleep On Latex Pure Green Organic Head/Feet Firmness
 Preview Graph
Plank Firm Luxe Head/Feet Firmness
 Compare in Graph Tool

Lumbar Firmness  

 Preview Graph
Sleep On Latex Pure Green Organic Lumbar Firmness
 Preview Graph
Plank Firm Luxe Lumbar Firmness
 Compare in Graph Tool

Firmness Video  

Normalized Stiffness @ Head/Feet 
 

78 Pa/mm
74 Pa/mm

Normalized Stiffness @ Lumbar 
 

81 Pa/mm
66 Pa/mm

Firmness Level 
 

Firm (81 Pa/mm)
Firm (66 Pa/mm)

Body Conformity 
 

6.0
6.1

Shoulder Indentation vs. Body Weight  

 Preview Graph
Sleep On Latex Pure Green Organic Shoulder Indentation vs. Body Weight
 Preview Graph
Plank Firm Luxe Shoulder Indentation vs. Body Weight
 Compare in Graph Tool

Indent @ 50 kg (110 lb) 
 

37 mm (1.5")
36 mm (1.4")

Indent @ 80 kg (176 lb) 
 

51 mm (2.0")
51 mm (2.0")

Indent @ 110 kg (242 lb) 
 

61 mm (2.4")
67 mm (2.6")

Support 
 

8.1
7.6

Pelvis Indentation vs. Body Weight  

 Preview Graph
Sleep On Latex Pure Green Organic Pelvis Indentation vs. Body Weight
 Preview Graph
Plank Firm Luxe Pelvis Indentation vs. Body Weight
 Compare in Graph Tool

Indent Difference @ 50 kg (110 lb) 
 

7 mm (0.3")
10 mm (0.4")

Indent Difference @ 80 kg (176 lb) 
 

9 mm (0.4")
16 mm (0.6")

Indent Difference @ 110 kg (242 lb) 
 

11 mm (0.4")
22 mm (0.9")

Bounciness 
 

7.4
8.7

Bounciness Video  

Maximum Rebound Height 
 

15.0 cm (5.9")
26.0 cm (10.2")

Comfort Layers Envelopment 
 

7.2
7.6

Sinking & Contouring Picture 
 

Compare High-Res
Sleep On Latex Pure Green Organic Sinking & Contouring Picture
Compare High-Res
Plank Firm Luxe Sinking & Contouring Picture

Sinking Depth 
 

4.1 cm (1.6")
4.3 cm (1.7")

Diameter Of Distortion 
 

24.5 cm (9.7")
24.1 cm (9.5")

Responsiveness 
 

9.8
9.7

Responsiveness Video  

Response Time 
 

0.2 s
0.2 s

Motion Isolation 
 

7.5
8.9

Motion Isolation Video  

Head/Feet Motion Isolation  

 Preview Graph
Sleep On Latex Pure Green Organic Head/Feet Motion Isolation
 Preview Graph
Plank Firm Luxe Head/Feet Motion Isolation
 Compare in Graph Tool

Lumbar Motion Isolation  

 Preview Graph
Sleep On Latex Pure Green Organic Lumbar Motion Isolation
 Preview Graph
Plank Firm Luxe Lumbar Motion Isolation
 Compare in Graph Tool

Peak Acceleration @ Head/Feet 
 

0.97 g
1.00 g

Dissipation Time @ Head/Feet 
 

0.49 s
0.52 s

Peak Acceleration @ Lumbar 
 

5.16 g
1.31 g

Dissipation Time @ Lumbar 
 

0.41 s
0.39 s

Edge Support 
 

9.7
9.6

Naturalistic Loading Pad Video  

Naturalistic Loading Pad  

 Preview Graph
Sleep On Latex Pure Green Organic Naturalistic Loading Pad
 Preview Graph
Plank Firm Luxe Naturalistic Loading Pad
 Compare in Graph Tool

Small Platen  

 Preview Graph
Sleep On Latex Pure Green Organic Small Platen
 Preview Graph
Plank Firm Luxe Small Platen
 Compare in Graph Tool

Naturalistic Loading Pad Indentation 
 

93 mm
105 mm

Small Platen Indentation @ 0 mm From Edge 
 

121 mm
129 mm

Small Platen Indentation @ 150 mm From Edge 
 

109 mm
116 mm

Increased Indentation @ Mattress Edge 
 

13 mm
13 mm

Cooling 
 

8.1
7.7

Cooling Graph  

 Preview Graph
Sleep On Latex Pure Green Organic Cooling Graph
 Preview Graph
Plank Firm Luxe Cooling Graph
 Compare in Graph Tool

Energy Transferred Over 1st Hour 
 

62 kJ
56 kJ

Energy Transferred Over 8 Hours 
 

174 kJ
163 kJ
Components

Cover 
 

Cover Picture 
 

Compare High-Res
Sleep On Latex Pure Green Organic Cover Picture
Compare High-Res
Plank Firm Luxe Cover Picture

Sleeping Surface Material 
 

Organic Cotton
Not Provided by Manufacturer

Removable 
 

Yes
No

Machine Washable 
 

No
No

Edge Construction 
 

Edge Support Picture 
 

Compare High-Res
Sleep On Latex Pure Green Organic Edge Support Picture
Compare High-Res
Plank Firm Luxe Edge Support Picture

Edge Component 
 

None
Pocket Coils

Foam Layer Material 
 

Foam Layer Material Picture 
 

Compare High-Res
Sleep On Latex Pure Green Organic Foam Layer Material Picture
Compare High-Res
Plank Firm Luxe Foam Layer Material Picture

Quilted Top Fill  

N/A
Polyfoam + Fiber Fill

Upper Comfort Foam @ Head/Feet  

Latex
Polyfoam

Upper Comfort Foam @ Lumbar  

Latex
Polyfoam

Lower Comfort Foam @ Head/Feet  

N/A
N/A

Lower Comfort Foam @ Lumbar  

N/A
N/A

Transition Foam  

Latex
Polyfoam

Support Foam  

Latex
N/A

Foam Layer Mass Density 
 

8.9
6.8

Quilted Top Fill  

N/A
24 kg/m³ (1.5 lb/cu.ft.)

Quilted Top Fill Foam Density vs. Reference 
 

N/A
0.6

Upper Comfort Foam @ Head/Feet  

68 kg/m³ (4.2 lb/cu.ft.)
41 kg/m³ (2.5 lb/cu.ft.)

Upper Comfort Foam @ Head/Feet Density vs. Reference 
 

1.4
1.7

Upper Comfort Foam @ Lumbar  

68 kg/m³ (4.2 lb/cu.ft.)
41 kg/m³ (2.5 lb/cu.ft.)

Upper Comfort Foam @ Lumbar Density vs. Reference 
 

1.4
1.7

Lower Comfort Foam @ Head/Feet  

N/A
N/A

Lower Comfort Foam @ Head/Feet Density vs. Reference 
 

N/A
N/A

Lower Comfort Foam @ Lumbar  

N/A
N/A

Lower Comfort Foam @ Lumbar Density vs. Reference 
 

N/A
N/A

Transition Foam  

93 kg/m³ (5.8 lb/cu.ft.)
29 kg/m³ (1.8 lb/cu.ft.)

Transition Foam Density vs. Reference 
 

2.2
0.9

Support Foam  

106 kg/m³ (6.6 lb/cu.ft.)
N/A

Support Foam Density vs Reference 
 

2.6
N/A

Foam Layer Thickness 
 

Foam Layer Thickness Picture 
 

Compare High-Res
Sleep On Latex Pure Green Organic Foam Layer Thickness Picture
Compare High-Res
Plank Firm Luxe Foam Layer Thickness Picture

Quilted Top 
 

N/A
5.0 cm (2.0")

Upper Comfort Foam @ Head/Feet  

4.6 cm (1.8")
2.5 cm (1.0")

Upper Comfort Foam @ Lumbar  

4.6 cm (1.8")
2.5 cm (1.0")

Lower Comfort Foam @ Head/Feet  

N/A
N/A

Lower Comfort Foam @ Lumbar  

N/A
N/A

Transition Foam  

4.6 cm (1.8")
5.0 cm (2.0")

Support Foam  

10.1 cm (4.0")
N/A

Spring Layer Dimensions 
 

Spring Layer Height Picture 
 

Compare High-Res
Sleep On Latex Pure Green Organic Spring Layer Height Picture
Compare High-Res
Plank Firm Luxe Spring Layer Height Picture

Spring Layer Density Picture 
 

Compare High-Res
Sleep On Latex Pure Green Organic Spring Layer Density Picture
Compare High-Res
Plank Firm Luxe 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 
 

N/A
16.0 cm (6.3")

Support Layer Coil Density 
 

N/A
230 coils/m² (21 coils/ft²)

Support Layer Coil Gauge @ Head/Feet 
 

N/A
13 gauge

Support Layer Coil Gauge @ Lumbar 
 

N/A
13 gauge

Foam Layer Firmness 
 

Comfort Layer IPD  

 Preview Graph
Sleep On Latex Pure Green Organic Comfort Layer IPD
 Preview Graph
Plank Firm Luxe Comfort Layer IPD
 Compare in Graph Tool

Transition & Support Layer IPD  

 Preview Graph
Sleep On Latex Pure Green Organic Transition & Support Layer IPD
 Preview Graph
Plank Firm Luxe Transition & Support Layer IPD
 Compare in Graph Tool

Quilted Top Fill 25% IPD 
 

N/A
1.8 kPa

Upper Comfort Foam @ Head/Feet 25% IPD 
 

1.9 kPa
3.9 kPa

Upper Comfort Foam @ Lumbar 25% IPD 
 

1.9 kPa
3.9 kPa

Lower Comfort Foam @ Head/Feet 25% IPD 
 

N/A
N/A

Lower Comfort Foam @ Lumbar 25% IPD 
 

N/A
N/A

Transition Foam 25% IPD 
 

3.3 kPa
5.9 kPa

Support Foam 25% IPD 
 

5.4 kPa
N/A

Spring Layer Firmness 
 

Comfort Layer Firmness  

Sleep On Latex Pure Green Organic Comfort Layer Firmness
Plank Firm Luxe Comfort Layer Firmness
 Compare in Graph Tool

Support Layer Firmness  

Sleep On Latex Pure Green Organic Support Layer Firmness
 Preview Graph
Plank Firm Luxe 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 
 

N/A
107 Pa/mm

Normalized Support Layer Stiffness @ Lumbar 
 

N/A
92 Pa/mm

Foam Layer Resilience 
 

Foam Layer Resilience Video  

Quilted Top Fill  

N/A
54%

Upper Comfort Foam @ Head/Feet  

41%
19%

Upper Comfort Foam @ Lumbar  

41%
19%

Lower Comfort Foam @ Head/Feet  

N/A
N/A

Lower Comfort Foam @ Lumbar  

N/A
N/A

Transition Foam  

41%
49%

Support Foam  

54%
N/A

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 
 

N/A
47.0 cm (18.5")

Check Price

 
Queen
Firm Luxe
SEE PRICE
Amazon.com
Queen (Medium)
Pure Green Organic
SEE PRICE
Amazon.com
 
Back to Top

Sleep On Latex Pure Green Organic

Plank Firm Luxe

Comments

  1. Comparison
 • Posted 1 month ago

Sleep On Latex Pure Green Organic vs Plank Firm Luxe: Main Discussion

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