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Plank Firm Luxe  Mattress Review

Notice: Below are the preliminary measurements for the Plank Firm Luxe. Members have early access to the test results, and some measurements may be updated before publication.

The full review will be published in a few days.
Tested using Methodology v1.1 
Plank Firm Luxe

Track

Mattress Type
Locked
Bed-In-A-Box
Locked
Firmness Level
Locked
Upper Comfort Foam @ LumbarLocked

Track

 0

Changelog

  1.  Updated Mar 18, 2026: Early access published.
  2.  Updated Feb 05, 2026: Our testers have started testing this product.
  3.  Updated Feb 05, 2026: The product has arrived in our lab, and our testers will start evaluating it soon.

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Test Results

perceptual testing image
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Design
Style
SAMPLE
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Plank Firm Luxe Style Picture Sample
Mattress Type
LockedLocked
Bed-In-A-Box
LockedLocked
Quilted Top Layer
LockedLocked
Grab Handles
LockedLocked
ThicknessLockedLock cm (Lock")
Performance
Firmness
SAMPLE
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Plank Firm Luxe Head/Feet Firmness Sample
SAMPLE
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Plank Firm Luxe Lumbar Firmness Sample
SAMPLE
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Plank Firm Luxe Firmness Video Sample
Normalized Stiffness @ Head/Feet
LockedLock Pa/mm
Normalized Stiffness @ Lumbar
LockedLock Pa/mm
Firmness Level
LockedLocked
0.0
Body Conformity
SAMPLE
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Plank Firm Luxe Shoulder Indentation vs. Body Weight Sample
Indent @ 50 kg (110 lb)
LockedLock mm (Lock")
Indent @ 80 kg (172 lb)
LockedLock mm (Lock")
Indent @ 110 kg (242 lb)
LockedLock mm (Lock")
0.0
Support
SAMPLE
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Plank Firm Luxe Pelvis Indentation vs. Body Weight Sample
Indent Difference @ 50 kg (110 lb)
LockedLock mm (Lock")
Indent Difference @ 80 kg (172 lb)
LockedLock mm (Lock")
Indent Difference @ 110 kg (242 lb)
LockedLock mm (Lock")
0.0
Bounciness
SAMPLE
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Plank Firm Luxe Bounciness Video Sample
Maximum Rebound Height
LockedLock cm (Lock")
0.0
Comfort Layers Envelopment
SAMPLE
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Plank Firm Luxe Sinking & Contouring Picture Sample
Sinking Depth
LockedLock cm (Lock")
Diameter Of Distortion
LockedLock cm (Lock")
0.0
Responsiveness
SAMPLE
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Plank Firm Luxe Responsiveness Video Sample
Response Time
LockedLock s
0.0
Motion Isolation
SAMPLE
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Plank Firm Luxe Motion Isolation Video Sample
SAMPLE
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Plank Firm Luxe Head/Feet Motion Isolation Sample
SAMPLE
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Plank Firm Luxe Lumbar Motion Isolation Sample
Peak Acceleration @ Head/Feet
LockedLock g
Dissipation Time @ Head/Feet
LockedLock s
Peak Acceleration @ Lumbar
LockedLock g
Dissipation Time @ Lumbar
LockedLock s
0.0
Edge Support
SAMPLE
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Plank Firm Luxe Naturalistic Loading Pad Video Sample
SAMPLE
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Plank Firm Luxe Naturalistic Loading Pad Sample
SAMPLE
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Plank Firm Luxe Small Platen Sample
Naturalistic Loading Pad Indentation
LockedLock mm
Small Platen Indentation @ 0 mm From Edge
LockedLock mm
Small Platen Indentation @ 150 mm From Edge
LockedLock mm
Increased Indentation @ Mattress Edge
LockedLock mm
0.0
Cooling
SAMPLE
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Plank Firm Luxe Cooling Graph Sample
Energy Transferred Over 1st Hour
LockedLock kJ
Energy Transferred Over 8 Hours
LockedLock kJ
Components
Cover
SAMPLE
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Plank Firm Luxe Cover Picture Sample
Sleeping Surface Material
LockedLocked
Removable
LockedLocked
Machine Washable
LockedLocked
Edge Construction
SAMPLE
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Plank Firm Luxe Edge Support Picture Sample
Edge Component
LockedLocked
Foam Layer Material
SAMPLE
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Plank Firm Luxe Foam Layer Material Picture Sample
Quilted Top FillLockedLocked
Upper Comfort Foam @ Head/FeetLockedLocked
Upper Comfort Foam @ LumbarLockedLocked
Lower Comfort Foam @ Head/FeetLockedN/A
Lower Comfort Foam @ LumbarLockedN/A
Transition FoamLockedLocked
Support FoamLockedN/A
0.0
Foam Layer Mass Density
Quilted Top FillLockedLock kg/m³ (Lock lb/cu.ft.)
Quilted Top Fill Foam Density vs. Reference
LockedLock
Upper Comfort Foam @ Head/FeetLockedLock kg/m³ (Lock lb/cu.ft.)
Upper Comfort Foam @ Head/Feet Density vs. Reference
LockedLock
Upper Comfort Foam @ LumbarLockedLock kg/m³ (Lock lb/cu.ft.)
Upper Comfort Foam @ Lumbar Density vs. Reference
LockedLock
Lower Comfort Foam @ Head/FeetLockedN/A
Lower Comfort Foam @ Head/Feet Density vs. Reference
LockedN/A
Lower Comfort Foam @ LumbarLockedN/A
Lower Comfort Foam @ Lumbar Density vs. Reference
LockedN/A
Transition FoamLockedLock kg/m³ (Lock lb/cu.ft.)
Transition Foam Density vs. Reference
LockedLock
Support FoamLockedN/A
Support Foam Density vs Reference
LockedN/A
Foam Layer Thickness
SAMPLE
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Plank Firm Luxe Foam Layer Thickness Picture Sample
Quilted Top
LockedLock cm (Lock")
Upper Comfort Foam @ Head/FeetLockedLock cm (Lock")
Upper Comfort Foam @ LumbarLockedLock cm (Lock")
Lower Comfort Foam @ Head/FeetLockedN/A
Lower Comfort Foam @ LumbarLockedN/A
Transition FoamLockedLock cm (Lock")
Support FoamLockedN/A
Spring Layer Dimensions
SAMPLE
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Plank Firm Luxe Spring Layer Height Picture Sample
SAMPLE
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Plank Firm Luxe Spring Layer Density Picture Sample
Comfort Layer Height
LockedN/A
Comfort Layer Coil Density
LockedN/A
Comfort Layer Coil Gauge
LockedN/A
Support Layer Height
LockedLock cm (Lock")
Support Layer Coil Density
LockedLock coils/m² (Lock coils/ft²)
Support Layer Coil Gauge @ Head/Feet
LockedLock gauge
Support Layer Coil Gauge @ Lumbar
LockedLock gauge
Foam Layer Firmness
SAMPLE
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Plank Firm Luxe Comfort Layer IPD Sample
SAMPLE
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Plank Firm Luxe Transition & Support Layer IPD Sample
Quilted Top Fill 25% IPD
LockedLock kPa
Upper Comfort Foam @ Head/Feet 25% IPD
LockedLock kPa
Upper Comfort Foam @ Lumbar 25% IPD
LockedLock kPa
Lower Comfort Foam @ Head/Feet 25% IPD
LockedN/A
Lower Comfort Foam @ Lumbar 25% IPD
LockedN/A
Transition Foam 25% IPD
LockedLock kPa
Support Foam 25% IPD
LockedN/A
Spring Layer Firmness
SAMPLE
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Plank Firm Luxe Support Layer Firmness Sample
SAMPLE
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Plank Firm Luxe Spring Layer Firmness Sample
Normalized Comfort Layer Stiffness @ Head/Feet
LockedN/A
Normalized Comfort Layer Stiffness @ Lumbar
LockedN/A
Normalized Support Layer Stiffness @ Head/Feet
LockedLock Pa/mm
Normalized Support Layer Stiffness @ Lumbar
LockedLock Pa/mm
Foam Layer Resilience
SAMPLE
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Plank Firm Luxe Foam Layer Resilience Video Sample
Quilted Top FillLockedLock%
Upper Comfort Foam @ Head/FeetLockedLock%
Upper Comfort Foam @ LumbarLockedLock%
Lower Comfort Foam @ Head/FeetLockedN/A
Lower Comfort Foam @ LumbarLockedN/A
Transition FoamLockedLock%
Support FoamLockedN/A
Spring Layer Bounciness
SAMPLE
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Plank Firm Luxe Support Spring Layer Bounciness Video Sample
Comfort Spring Layer Maximum Rebound Height
LockedN/A
Support Spring Layer Maximum Rebound Height
LockedLock cm (Lock")
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