Plank Extra Firm Luxe vs Sleep On Latex Pure Green Organic: Which Mattress Is Better?

Tested using Methodology v1.2

Updated Mar 25, 2026 03:29 PM

See Plank Extra Firm Luxe Review

Sleep On Latex Pure Green Organic Picture

Mattress Type Hybrid

Bed-In-A-Box Yes

Upper Comfort Foam @ LumbarN/A

Firmness Level Firm (96 Pa/mm)

Mattress Type Foam

Bed-In-A-Box Yes

Upper Comfort Foam @ LumbarLatex

Firmness Level Firm (81 Pa/mm)

Recommended in 4 articles:
Mattresses
Firm
Heavy People
1

Our Verdict

Plank Extra Firm Luxe

Sleep On Latex Pure Green Organic

Full comparison details regarding individual product score sets can be found in the section below

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Variants

Extra Firm Luxe (Queen)

Pure Green Organic (Queen (Medium))

Review

See Sleep On Latex Pure Green Organic Review

Check Price

Queen

Extra Firm Luxe

Queen (Medium)

Pure Green Organic

Notice: Two or more of the products being compared have been tested with different test methodologies. Some of the results aren't directly comparable. Learn how our test benches and scoring system work, and read more about the latest changes to our mattresses test methodology.

Threshold

0.10

Side Sleeping

0.0

6.4

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Full Comparison

Side Sleeping

0.0

6.4

Back Sleeping

0.0

7.6

Stomach Sleeping

0.0

8.0

Longevity

0.0

8.9

Pressure Relief

0.0

6.2

Support

0.0

8.1

Cooling

0.0

8.1

Motion Dissipation

0.0

7.5

Responsiveness

0.0

9.3

Design

Style

Style Picture

SAMPLE

for pictures & test results

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$Sleep On Latex Pure Green Organic Style Picture$

Mattress Type

Locked

Foam

Bed-In-A-Box

Locked

Yes

Quilted Top Layer

Locked

Grab Handles

Locked

Thickness

Lock cm (Lock")

19.2 cm (7.6")

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Performance

Firmness

Head/Feet Firmness

SAMPLE

for pictures & test results

Preview Graph

$Sleep On Latex Pure Green Organic Head/Feet Firmness$

Lumbar Firmness

SAMPLE

for pictures & test results

Preview Graph

$Sleep On Latex Pure Green Organic Lumbar Firmness$

Firmness Video

SAMPLE

for videos & test results

Normalized Stiffness @ Head/Feet

Lock Pa/mm

78 Pa/mm

Normalized Stiffness @ Lumbar

Lock Pa/mm

81 Pa/mm

Firmness Level

Locked

Firm (81 Pa/mm)

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Body Conformity

N/A

6.0

Shoulder Indentation vs. Body Weight

SAMPLE

for pictures & test results

Preview Graph

$Sleep On Latex Pure Green Organic Shoulder Indentation vs. Body Weight$

Indent @ 50 kg (110 lb)

Lock mm (Lock")

37 mm (1.5")

Indent @ 80 kg (176 lb)

Lock mm (Lock")

51 mm (2.0")

Indent @ 110 kg (242 lb)

Lock mm (Lock")

61 mm (2.4")

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Support

N/A

8.1

Pelvis Indentation vs. Body Weight

SAMPLE

for pictures & test results

Preview Graph

$Sleep On Latex Pure Green Organic Pelvis Indentation vs. Body Weight$

Indent Difference @ 50 kg (110 lb)

Lock mm (Lock")

7 mm (0.3")

Indent Difference @ 80 kg (176 lb)

Lock mm (Lock")

9 mm (0.4")

Indent Difference @ 110 kg (242 lb)

Lock mm (Lock")

11 mm (0.4")

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Bounciness

N/A

7.4

Bounciness Video

SAMPLE

for videos & test results

Maximum Rebound Height

Lock cm (Lock")

15.0 cm (5.9")

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Comfort Layers Envelopment

N/A

7.2

Sinking & Contouring Picture

SAMPLE

for pictures & test results

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$Sleep On Latex Pure Green Organic Sinking & Contouring Picture$

Sinking Depth

Lock cm (Lock")

4.1 cm (1.6")

Diameter Of Distortion

Lock cm (Lock")

24.5 cm (9.7")

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Responsiveness

N/A

9.8

Responsiveness Video

SAMPLE

for videos & test results

Response Time

Lock s

0.2 s

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Motion Isolation

N/A

7.5

Motion Isolation Video

SAMPLE

for videos & test results

Head/Feet Motion Isolation

SAMPLE

for pictures & test results

Preview Graph

$Sleep On Latex Pure Green Organic Head/Feet Motion Isolation$

Lumbar Motion Isolation

SAMPLE

for pictures & test results

Preview Graph

$Sleep On Latex Pure Green Organic Lumbar Motion Isolation$

Peak Acceleration @ Head/Feet

Lock g

0.97 g

Dissipation Time @ Head/Feet

Lock s

0.49 s

Peak Acceleration @ Lumbar

Lock g

5.16 g

Dissipation Time @ Lumbar

Lock s

0.41 s

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Edge Support

N/A

9.7

Naturalistic Loading Pad Video

SAMPLE

for videos & test results

Naturalistic Loading Pad

SAMPLE

for pictures & test results

Preview Graph

$Sleep On Latex Pure Green Organic Naturalistic Loading Pad$

Small Platen

SAMPLE

for pictures & test results

Preview Graph

$Sleep On Latex Pure Green Organic Small Platen$

Naturalistic Loading Pad Indentation

Lock mm

93 mm

Small Platen Indentation @ 0 mm From Edge

Lock mm

121 mm

Small Platen Indentation @ 150 mm From Edge

Lock mm

109 mm

Increased Indentation @ Mattress Edge

Lock mm

13 mm

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Cooling

N/A

8.1

Cooling Graph

SAMPLE

for pictures & test results

Preview Graph

$Sleep On Latex Pure Green Organic Cooling Graph$

Energy Transferred Over 1st Hour

Lock kJ

62 kJ

Energy Transferred Over 8 Hours

Lock kJ

174 kJ

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Components

Cover

Cover Picture

SAMPLE

for pictures & test results

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$Sleep On Latex Pure Green Organic Cover Picture$

Sleeping Surface Material

Locked

Organic Cotton

Removable

Locked

Yes

Machine Washable

Locked

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Edge Construction

Edge Support Picture

SAMPLE

for pictures & test results

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$Sleep On Latex Pure Green Organic Edge Support Picture$

Edge Component

Locked

None

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Foam Layer Material

Foam Layer Material Picture

SAMPLE

for pictures & test results

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$Sleep On Latex Pure Green Organic Foam Layer Material Picture$

Quilted Top Fill

Locked

N/A

Upper Comfort Foam @ Head/Feet

N/A

Latex

Upper Comfort Foam @ Lumbar

N/A

Latex

Lower Comfort Foam @ Head/Feet

N/A

Lower Comfort Foam @ Lumbar

N/A

Transition Foam

Locked

Latex

Support Foam

N/A

Latex

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Foam Layer Mass Density

N/A

8.9

Quilted Top Fill

Lock kg/m³ (Lock lb/cu.ft.)

N/A

Quilted Top Fill Foam Density vs. Reference

Lock

N/A

Upper Comfort Foam @ Head/Feet

N/A

68 kg/m³ (4.2 lb/cu.ft.)

Upper Comfort Foam @ Head/Feet Density vs. Reference

N/A

1.4

Upper Comfort Foam @ Lumbar

N/A

68 kg/m³ (4.2 lb/cu.ft.)

Upper Comfort Foam @ Lumbar Density vs. Reference

N/A

1.4

Lower Comfort Foam @ Head/Feet

N/A

Lower Comfort Foam @ Head/Feet Density vs. Reference

N/A

Lower Comfort Foam @ Lumbar

N/A

Lower Comfort Foam @ Lumbar Density vs. Reference

N/A

Transition Foam

Lock kg/m³ (Lock lb/cu.ft.)

93 kg/m³ (5.8 lb/cu.ft.)

Transition Foam Density vs. Reference

Lock

2.2

Support Foam

N/A

106 kg/m³ (6.6 lb/cu.ft.)

Support Foam Density vs Reference

N/A

2.6

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Foam Layer Thickness

Foam Layer Thickness Picture

SAMPLE

for pictures & test results

Compare High-Res

$Sleep On Latex Pure Green Organic Foam Layer Thickness Picture$

Quilted Top

Lock cm (Lock")

N/A

Upper Comfort Foam @ Head/Feet

N/A

4.6 cm (1.8")

Upper Comfort Foam @ Lumbar

N/A

4.6 cm (1.8")

Lower Comfort Foam @ Head/Feet

N/A

Lower Comfort Foam @ Lumbar

N/A

Transition Foam

Lock cm (Lock")

4.6 cm (1.8")

Support Foam

N/A

10.1 cm (4.0")

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Spring Layer Dimensions

Spring Layer Height Picture

SAMPLE

for pictures & test results

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Sleep On Latex Pure Green Organic Spring Layer Height Picture

Spring Layer Density Picture

SAMPLE

for pictures & test results

Compare High-Res

Sleep On Latex Pure Green Organic Spring Layer Density Picture

Comfort Layer Height

N/A

Comfort Layer Coil Density

N/A

Comfort Layer Coil Gauge

N/A

Support Layer Height

Lock cm (Lock")

N/A

Support Layer Coil Density

Lock coils/m² (Lock coils/ft²)

N/A

Support Layer Coil Gauge @ Head/Feet

Lock gauge

N/A

Support Layer Coil Gauge @ Lumbar

Lock gauge

N/A

Foam Layer Firmness

Comfort Layer IPD

SAMPLE

for pictures & test results

Preview Graph

$Sleep On Latex Pure Green Organic Comfort Layer IPD$

Transition & Support Layer IPD

SAMPLE

for pictures & test results

Preview Graph

$Sleep On Latex Pure Green Organic Transition & Support Layer IPD$

Quilted Top Fill 25% IPD

Lock kPa

N/A

Upper Comfort Foam @ Head/Feet 25% IPD

N/A

1.9 kPa

Upper Comfort Foam @ Lumbar 25% IPD

N/A

1.9 kPa

Lower Comfort Foam @ Head/Feet 25% IPD

N/A

Lower Comfort Foam @ Lumbar 25% IPD

N/A

Transition Foam 25% IPD

Lock kPa

3.3 kPa

Support Foam 25% IPD

N/A

5.4 kPa

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Spring Layer Firmness

Comfort Layer Firmness

SAMPLE

for pictures & test results

Sleep On Latex Pure Green Organic Comfort Layer Firmness

Support Layer Firmness

SAMPLE

for pictures & test results

Sleep On Latex Pure Green Organic Support Layer Firmness

Spring Layer Firmness

SAMPLE

for videos & test results

Normalized Comfort Layer Stiffness @ Head/Feet

N/A

Normalized Comfort Layer Stiffness @ Lumbar

N/A

Normalized Support Layer Stiffness @ Head/Feet

Lock Pa/mm

N/A

Normalized Support Layer Stiffness @ Lumbar

Lock Pa/mm

N/A

Foam Layer Resilience

Foam Layer Resilience Video

SAMPLE

for videos & test results

Quilted Top Fill

Lock%

N/A

Upper Comfort Foam @ Head/Feet

N/A

41%

Upper Comfort Foam @ Lumbar

N/A

41%

Lower Comfort Foam @ Head/Feet

N/A

Lower Comfort Foam @ Lumbar

N/A

Transition Foam

Lock%

41%

Support Foam

N/A

54%

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Spring Layer Bounciness

Comfort Spring Layer Bounciness Video

SAMPLE

for videos & test results

Support Spring Layer Bounciness Video

SAMPLE

for videos & test results

Comfort Spring Layer Maximum Rebound Height

N/A

Support Spring Layer Maximum Rebound Height

Lock cm (Lock")

N/A

Check Price

Queen

Extra Firm Luxe

Queen (Medium)

Pure Green Organic