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

Tested using Methodology v1.1

Updated Feb 06, 2026 04:31 PM

This review is in Early access

See Sleep On Latex Pure Green Organic Review

Sleep On Latex Pure Green Organic Picture

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)

Recommended in 3 articles:
Firm
Heavy People
Mattresses-In-A-Box

Our Verdict

Sleep On Latex Pure Green Organic

Plank Firm Luxe

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

Variants

Pure Green Organic (Queen (Medium))

Firm Luxe (Queen)

Review

See Plank Firm Luxe Review

Check Price

Queen

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

6.4

0.0

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

Full Comparison

Side Sleeping

6.4

0.0

Back Sleeping

7.6

0.0

Stomach Sleeping

8.0

0.0

Longevity

8.9

0.0

Pressure Relief

6.2

0.0

Support

8.1

0.0

Cooling

8.1

0.0

Motion Dissipation

7.5

0.0

Responsiveness

9.3

0.0

Design

Style

Style Picture

Compare High-Res

$Sleep On Latex Pure Green Organic Style Picture$

SAMPLE

for pictures & test results

Mattress Type

Foam

Locked

Bed-In-A-Box

Yes

Locked

Quilted Top Layer

Locked

Grab Handles

Locked

Thickness

19.2 cm (7.6")

Lock cm (Lock")

Show Text

Performance

Firmness

Head/Feet Firmness

Preview Graph

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

SAMPLE

for pictures & test results

Lumbar Firmness

Preview Graph

$Sleep On Latex Pure Green Organic Lumbar Firmness$

SAMPLE

for pictures & test results

Firmness Video

SAMPLE

for videos & test results

Normalized Stiffness @ Head/Feet

78 Pa/mm

Lock Pa/mm

Normalized Stiffness @ Lumbar

81 Pa/mm

Lock Pa/mm

Firmness Level

Firm (81 Pa/mm)

Locked

Show Text

Body Conformity

6.0

N/A

Shoulder Indentation vs. Body Weight

Preview Graph

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

SAMPLE

for pictures & test results

Indent @ 50 kg (110 lb)

37 mm (1.5")

Lock mm (Lock")

Indent @ 80 kg (176 lb)

51 mm (2.0")

Lock mm (Lock")

Indent @ 110 kg (242 lb)

61 mm (2.4")

Lock mm (Lock")

Show Text

Support

8.1

N/A

Pelvis Indentation vs. Body Weight

Preview Graph

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

SAMPLE

for pictures & test results

Indent Difference @ 50 kg (110 lb)

7 mm (0.3")

Lock mm (Lock")

Indent Difference @ 80 kg (176 lb)

9 mm (0.4")

Lock mm (Lock")

Indent Difference @ 110 kg (242 lb)

11 mm (0.4")

Lock mm (Lock")

Show Text

Bounciness

7.4

N/A

Bounciness Video

SAMPLE

for videos & test results

Maximum Rebound Height

15.0 cm (5.9")

Lock cm (Lock")

Show Text

Comfort Layers Envelopment

7.2

N/A

Sinking & Contouring Picture

Compare High-Res

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

SAMPLE

for pictures & test results

Sinking Depth

4.1 cm (1.6")

Lock cm (Lock")

Diameter Of Distortion

24.5 cm (9.7")

Lock cm (Lock")

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Responsiveness

9.8

N/A

Responsiveness Video

SAMPLE

for videos & test results

Response Time

0.2 s

Lock s

Show Text

Motion Isolation

7.5

N/A

Motion Isolation Video

SAMPLE

for videos & test results

Head/Feet Motion Isolation

Preview Graph

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

SAMPLE

for pictures & test results

Lumbar Motion Isolation

Preview Graph

$Sleep On Latex Pure Green Organic Lumbar Motion Isolation$

SAMPLE

for pictures & test results

Peak Acceleration @ Head/Feet

0.97 g

Lock g

Dissipation Time @ Head/Feet

0.49 s

Lock s

Peak Acceleration @ Lumbar

5.16 g

Lock g

Dissipation Time @ Lumbar

0.41 s

Lock s

Show Text

Edge Support

9.7

N/A

Naturalistic Loading Pad Video

SAMPLE

for videos & test results

Naturalistic Loading Pad

Preview Graph

$Sleep On Latex Pure Green Organic Naturalistic Loading Pad$

SAMPLE

for pictures & test results

Small Platen

Preview Graph

$Sleep On Latex Pure Green Organic Small Platen$

SAMPLE

for pictures & test results

Naturalistic Loading Pad Indentation

93 mm

Lock mm

Small Platen Indentation @ 0 mm From Edge

121 mm

Lock mm

Small Platen Indentation @ 150 mm From Edge

109 mm

Lock mm

Increased Indentation @ Mattress Edge

13 mm

Lock mm

Show Text

Cooling

8.1

N/A

Cooling Graph

Preview Graph

$Sleep On Latex Pure Green Organic Cooling Graph$

SAMPLE

for pictures & test results

Energy Transferred Over 1st Hour

62 kJ

Lock kJ

Energy Transferred Over 8 Hours

174 kJ

Lock kJ

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Components

Cover

Cover Picture

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$Sleep On Latex Pure Green Organic Cover Picture$

SAMPLE

for pictures & test results

Sleeping Surface Material

Organic Cotton

Locked

Removable

Yes

Locked

Machine Washable

Locked

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Edge Construction

Edge Support Picture

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$Sleep On Latex Pure Green Organic Edge Support Picture$

SAMPLE

for pictures & test results

Edge Component

None

Locked

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Foam Layer Material

Foam Layer Material Picture

Compare High-Res

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

SAMPLE

for pictures & test results

Quilted Top Fill

N/A

Locked

Upper Comfort Foam @ Head/Feet

Latex

Locked

Upper Comfort Foam @ Lumbar

Latex

Locked

Lower Comfort Foam @ Head/Feet

N/A

Lower Comfort Foam @ Lumbar

N/A

Transition Foam

Latex

Locked

Support Foam

Latex

N/A

Show Text

Foam Layer Mass Density

8.9

N/A

Quilted Top Fill

N/A

Lock kg/m³ (Lock lb/cu.ft.)

Quilted Top Fill Foam Density vs. Reference

N/A

Lock

Upper Comfort Foam @ Head/Feet

68 kg/m³ (4.2 lb/cu.ft.)

Lock kg/m³ (Lock lb/cu.ft.)

Upper Comfort Foam @ Head/Feet Density vs. Reference

1.4

Lock

Upper Comfort Foam @ Lumbar

68 kg/m³ (4.2 lb/cu.ft.)

Lock kg/m³ (Lock lb/cu.ft.)

Upper Comfort Foam @ Lumbar Density vs. Reference

1.4

Lock

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

93 kg/m³ (5.8 lb/cu.ft.)

Lock kg/m³ (Lock lb/cu.ft.)

Transition Foam Density vs. Reference

2.2

Lock

Support Foam

106 kg/m³ (6.6 lb/cu.ft.)

N/A

Support Foam Density vs Reference

2.6

N/A

Show Text

Foam Layer Thickness

Foam Layer Thickness Picture

Compare High-Res

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

SAMPLE

for pictures & test results

Quilted Top

N/A

Lock cm (Lock")

Upper Comfort Foam @ Head/Feet

4.6 cm (1.8")

Lock cm (Lock")

Upper Comfort Foam @ Lumbar

4.6 cm (1.8")

Lock cm (Lock")

Lower Comfort Foam @ Head/Feet

N/A

Lower Comfort Foam @ Lumbar

N/A

Transition Foam

4.6 cm (1.8")

Lock cm (Lock")

Support Foam

10.1 cm (4.0")

N/A

Show Text

Spring Layer Dimensions

Spring Layer Height Picture

Compare High-Res

SAMPLE

for pictures & test results

Spring Layer Density Picture

Compare High-Res

SAMPLE

for pictures & test results

Comfort Layer Height

N/A

Comfort Layer Coil Density

N/A

Comfort Layer Coil Gauge

N/A

Support Layer Height

N/A

Lock cm (Lock")

Support Layer Coil Density

N/A

Lock coils/m² (Lock coils/ft²)

Support Layer Coil Gauge @ Head/Feet

N/A

Lock gauge

Support Layer Coil Gauge @ Lumbar

N/A

Lock gauge

Foam Layer Firmness

Comfort Layer IPD

Preview Graph

$Sleep On Latex Pure Green Organic Comfort Layer IPD$

SAMPLE

for pictures & test results

Transition & Support Layer IPD

Preview Graph

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

SAMPLE

for pictures & test results

Quilted Top Fill 25% IPD

N/A

Lock kPa

Upper Comfort Foam @ Head/Feet 25% IPD

1.9 kPa

Lock kPa

Upper Comfort Foam @ Lumbar 25% IPD

1.9 kPa

Lock kPa

Lower Comfort Foam @ Head/Feet 25% IPD

N/A

Lower Comfort Foam @ Lumbar 25% IPD

N/A

Transition Foam 25% IPD

3.3 kPa

Lock kPa

Support Foam 25% IPD

5.4 kPa

N/A

Show Text

Spring Layer Firmness

Comfort Layer Firmness

SAMPLE

for pictures & test results

Support Layer Firmness

SAMPLE

for pictures & test results

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

N/A

Lock Pa/mm

Normalized Support Layer Stiffness @ Lumbar

N/A

Lock Pa/mm

Foam Layer Resilience

Foam Layer Resilience Video

SAMPLE

for videos & test results

Quilted Top Fill

N/A

Lock%

Upper Comfort Foam @ Head/Feet

41%

Lock%

Upper Comfort Foam @ Lumbar

41%

Lock%

Lower Comfort Foam @ Head/Feet

N/A

Lower Comfort Foam @ Lumbar

N/A

Transition Foam

41%

Lock%

Support Foam

54%

N/A

Show Text

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

N/A

Lock cm (Lock")

Check Price

Queen

Firm Luxe

Queen (Medium)

Pure Green Organic