Products
Tested using Methodology v1.2
Updated Apr 03, 2026 05:08 PM
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Tested using Methodology v1.2
Updated Apr 03, 2026 05:13 PM
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Mattress Type
Hybrid
Bed-In-A-Box
Yes
Upper Comfort Foam @ LumbarN/A
Firmness Level
Firm (96 Pa/mm)
Mattress Type
Hybrid
Bed-In-A-Box
Yes
Upper Comfort Foam @ LumbarMemory Foam
Firmness Level
Firm (62 Pa/mm)
Our Verdict
Plank Extra Firm Luxe
Novaform Legacy
The Novaform Legacy is better than the Plank Extra Firm Luxe for most people. They both have good overall support and are well-suited for average-weight and lighter back/stomach sleepers, but the Novaform offers better pressure relief, as you'll sink into it a little more. It's more cooling, so it's better for hot sleepers. That said, the Plank Extra Firm is one side of a flippable mattress, so you can also sleep on its slightly softer 'Firm' side. Its edge support is also much better.
Variants
- Extra Firm Luxe (Queen)
- Legacy (Queen)
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Queen
Extra Firm Luxe
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Queen
Legacy
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Main Differences for
Side Sleeping
Side Sleeping
Threshold
Side Sleeping
5.0
6.8
Full Comparison
Design
Style
Style Picture
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Mattress Type
Hybrid
Hybrid
Bed-In-A-Box
Yes
Yes
Quilted Top Layer
Yes
Yes
Grab Handles
No
Yes
Thickness
34.9 cm (13.7")
35.5 cm (14.0")
Performance
Firmness
Head/Feet Firmness
Preview Graph
Preview Graph
Lumbar Firmness
Preview Graph
Preview Graph
Firmness Video
Normalized Stiffness @ Head/Feet
89 Pa/mm
70 Pa/mm
Normalized Stiffness @ Lumbar
96 Pa/mm
62 Pa/mm
Firmness Level
Firm (96 Pa/mm)
Firm (62 Pa/mm)
Body Conformity
4.4
6.4
Shoulder Indentation vs. Body Weight
Preview Graph
Preview Graph
Indent @ 50 kg (110 lb)
22 mm (0.9")
37 mm (1.4")
Indent @ 80 kg (176 lb)
36 mm (1.4")
53 mm (2.1")
Indent @ 110 kg (242 lb)
57 mm (2.2")
75 mm (2.9")
Support
7.7
7.7
Pelvis Indentation vs. Body Weight
Preview Graph
Preview Graph
Indent Difference @ 50 kg (110 lb)
6 mm (0.2")
6 mm (0.2")
Indent Difference @ 80 kg (176 lb)
12 mm (0.5")
13 mm (0.5")
Indent Difference @ 110 kg (242 lb)
22 mm (0.9")
23 mm (0.9")
Bounciness
8.6
7.5
Bounciness Video
Maximum Rebound Height
25.0 cm (9.8")
16.0 cm (6.3")
Comfort Layers Envelopment
6.1
7.9
Sinking & Contouring Picture
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Sinking Depth
2.6 cm (1.0")
4.4 cm (1.7")
Diameter Of Distortion
20.8 cm (8.2")
22.5 cm (8.9")
Responsiveness
9.8
9.7
Responsiveness Video
Response Time
0.1 s
0.2 s
Motion Isolation
8.7
8.8
Motion Isolation Video
Head/Feet Motion Isolation
Preview Graph
Preview Graph
Lumbar Motion Isolation
Preview Graph
Preview Graph
Peak Acceleration @ Head/Feet
0.93 g
0.84 g
Dissipation Time @ Head/Feet
0.46 s
0.28 s
Peak Acceleration @ Lumbar
1.59 g
2.51 g
Dissipation Time @ Lumbar
0.46 s
0.29 s
Edge Support
9.3
5.5
Naturalistic Loading Pad Video
Naturalistic Loading Pad
Preview Graph
Preview Graph
Small Platen
Preview Graph
Preview Graph
Naturalistic Loading Pad Indentation
98 mm
142 mm
Small Platen Indentation @ 0 mm From Edge
124 mm
187 mm
Small Platen Indentation @ 150 mm From Edge
106 mm
124 mm
Increased Indentation @ Mattress Edge
18 mm
63 mm
Cooling
7.8
8.2
Cooling Graph
Preview Graph
Preview Graph
Energy Transferred Over 1st Hour
55 kJ
65 kJ
Energy Transferred Over 8 Hours
169 kJ
172 kJ
Components
Cover
Cover Picture
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Sleeping Surface Material
Not Provided by Manufacturer
Polyester, Olefin, Spandex
Removable
No
Yes
Machine Washable
No
No
Edge Construction
Edge Support Picture
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Edge Component
Pocket Coils
Polyfoam
Foam Layer Material
Foam Layer Material Picture
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Quilted Top Fill
Polyfoam + Fiber Fill
Polyfoam + Fiber Fill
Upper Comfort Foam @ Head/Feet
N/A
Memory Foam
Upper Comfort Foam @ Lumbar
N/A
Memory Foam
Lower Comfort Foam @ Head/Feet
N/A
N/A
Lower Comfort Foam @ Lumbar
N/A
N/A
Transition Foam
Polyfoam
Polyfoam
Support Foam
N/A
N/A
Foam Layer Mass Density
6.5
6.6
Quilted Top Fill
26 kg/m³ (1.6 lb/cu.ft.)
22 kg/m³ (1.4 lb/cu.ft.)
Quilted Top Fill Foam Density vs. Reference
0.7
0.5
Upper Comfort Foam @ Head/Feet
N/A
62 kg/m³ (3.8 lb/cu.ft.)
Upper Comfort Foam @ Head/Feet Density vs. Reference
N/A
1.0
Upper Comfort Foam @ Lumbar
N/A
62 kg/m³ (3.8 lb/cu.ft.)
Upper Comfort Foam @ Lumbar Density vs. Reference
N/A
1.0
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
29 kg/m³ (1.8 lb/cu.ft.)
30 kg/m³ (1.9 lb/cu.ft.)
Transition Foam Density vs. Reference
0.9
1.0
Support Foam
N/A
N/A
Support Foam Density vs Reference
N/A
N/A
Foam Layer Thickness
Foam Layer Thickness Picture
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Quilted Top
3.2 cm (1.3")
5.4 cm (2.1")
Upper Comfort Foam @ Head/Feet
N/A
5.8 cm (2.3")
Upper Comfort Foam @ Lumbar
N/A
5.8 cm (2.3")
Lower Comfort Foam @ Head/Feet
N/A
N/A
Lower Comfort Foam @ Lumbar
N/A
N/A
Transition Foam
5.2 cm (2.0")
6.9 cm (2.7")
Support Foam
N/A
N/A
Spring Layer Dimensions
Spring Layer Height Picture
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Spring Layer Density Picture
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Compare High-Res
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
16.0 cm (6.3")
17.0 cm (6.7")
Support Layer Coil Density
230 coils/m² (21 coils/ft²)
265 coils/m² (25 coils/ft²)
Support Layer Coil Gauge @ Head/Feet
13 gauge
13 gauge
Support Layer Coil Gauge @ Lumbar
13 gauge
14 gauge
Foam Layer Firmness
Comfort Layer IPD
Preview Graph
Preview Graph
Transition & Support Layer IPD
Preview Graph
Preview Graph
Quilted Top Fill 25% IPD
5.9 kPa
2.2 kPa
Upper Comfort Foam @ Head/Feet 25% IPD
N/A
4.2 kPa
Upper Comfort Foam @ Lumbar 25% IPD
N/A
4.2 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
5.4 kPa
2.9 kPa
Support Foam 25% IPD
N/A
N/A
Spring Layer Firmness
Comfort Layer Firmness
Support Layer Firmness
Preview Graph
Preview Graph
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
107 Pa/mm
103 Pa/mm
Normalized Support Layer Stiffness @ Lumbar
92 Pa/mm
106 Pa/mm
Foam Layer Resilience
Foam Layer Resilience Video
Quilted Top Fill
29%
48%
Upper Comfort Foam @ Head/Feet
N/A
3%
Upper Comfort Foam @ Lumbar
N/A
3%
Lower Comfort Foam @ Head/Feet
N/A
N/A
Lower Comfort Foam @ Lumbar
N/A
N/A
Transition Foam
48%
47%
Support Foam
N/A
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
47.0 cm (18.5")
48.0 cm (18.9")
Check Price
Queen
Extra Firm Luxe
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Queen
Legacy
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Plank Extra Firm Luxe
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Comments
Plank Extra Firm Luxe vs Novaform Legacy: Main Discussion
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