Products
Purple Mattress
Novaform ComfortGrande Plus
Tested using Methodology v1.0.1
Updated Nov 25, 2025 10:46 PM
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Purple
Tested using Methodology v1.0.1
Updated Oct 31, 2025 05:33 PM
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Novaform
Mattress Type
Foam
Bounciness Level
Moderate (14 cm)
Sinking Level
Low (3 cm)
Firmness Level
Medium-Firm (51 Pa/mm)
Contouring Level
Very High (23 cm)
Mattress Type
Foam
Bounciness Level
Very Low (4 cm)
Sinking Level
Moderate (5 cm)
Firmness Level
Medium-Firm (52 Pa/mm)
Contouring Level
Moderate (28 cm)
Our Verdict
Purple Mattress
Novaform ComfortGrande Plus
You might prefer either the Purple Mattress or the Novaform ComfortGrande Plus. Both are medium-firm and best suited for light and average back and stomach sleepers. The Novaform uses memory foam, so it contours but moves slowly. It offers better motion isolation, making it much better for sleeping with a partner. The Purple is very responsive, so you never feel stuck in place. It stands out for its fantastic cooling and is a much better option for hot sleepers.
Variants
- Mattress (Queen)
- ComfortGrande Plus (Queen)
Check Price
Queen
Mattress
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Purple
Queen
ComfortGrande Plus
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Novaform
Main Differences for
Sleeping (In Development)
Sleeping (In Development)
Threshold
Sleeping (In Development)
8.6
7.9
Cooling
9.7
7.7
Motion Isolation
7.7
9.2
Responsiveness
9.8
6.9
Full Comparison
Design
Style
Style Picture
Mattress Type
Foam
Foam
Bed-In-A-Box
Yes
Yes
Quilted Top Layer
No
No
Grab Handles
No
Yes
Thickness
23.4 cm (9.2")
34.9 cm (13.7")
Performance
Firmness
Head/Feet Firmness
Lumbar Firmness
Firmness Video
Normalized Stiffness @ Head/Feet
46 Pa/mm
52 Pa/mm
Normalized Stiffness @ Lumbar
51 Pa/mm
52 Pa/mm
Firmness Level
Medium-Firm (51 Pa/mm)
Medium-Firm (52 Pa/mm)
Bounciness
Bounciness Video
Maximum Rebound Height
13.5 cm (5.3")
4.0 cm (1.6")
Bounciness Level
Moderate (14 cm)
Very Low (4 cm)
Sinking & Contouring
Sinking & Contouring Picture
Sinking Depth
3.5 cm (1.4")
4.8 cm (1.9")
Diameter Of Distortion
22.7 cm (8.9")
28.3 cm (11.1")
Sinking Level
Low (3 cm)
Moderate (5 cm)
Contouring Level
Very High (23 cm)
Moderate (28 cm)
Responsiveness
9.8
6.9
Responsiveness Video
Response Time
0.2 s
1.4 s
Motion Isolation
7.7
9.2
Motion Isolation Video
Head/Feet Motion Isolation
Lumbar Motion Isolation
Peak Acceleration @ Head/Feet
0.84 g
0.58 g
Dissipation Time @ Head/Feet
0.51 s
0.25 s
Peak Acceleration @ Lumbar
4.05 g
1.97 g
Dissipation Time @ Lumbar
0.42 s
0.23 s
Edge Support
7.3
7.4
Naturalistic Loading Pad Video
Naturalistic Loading Pad
Small Platen
Naturalistic Loading Pad Indentation
133 mm
139 mm
Small Platen Indentation @ 0 mm From Edge
168 mm
157 mm
Small Platen Indentation @ 150 mm From Edge
135 mm
129 mm
Increased Indentation @ Mattress Edge
33 mm
29 mm
Cooling
9.7
7.7
Cooling Graph
Energy Transferred Over 1st Hour
109 kJ
64 kJ
Energy Transferred Over 8 Hours
218 kJ
157 kJ
Components
Cover
Cover Picture
Sleeping Surface Material
Polyester, Spandex
Polyester, Nylon, Polyethylene, Spandex
Removable
Yes
No
Machine Washable
No
No
Edge Construction
Edge Support Picture
Edge Component
Polyfoam
None
Foam Layer Material
Foam Layer Material Picture
Quilted Top Fill
N/A
N/A
Upper Comfort Foam @ Head/Feet
Elastic Polymer Grid
Memory Foam
Upper Comfort Foam @ Lumbar
Elastic Polymer Grid
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
Polyfoam
Polyfoam
Foam Layer Mass Density
7.1
6.9
Quilted Top Fill
N/A
N/A
Quilted Top Fill Foam Density vs. Reference
N/A
N/A
Upper Comfort Foam @ Head/Feet
744 kg/m³ (46.4 lb/cu.ft.)
50 kg/m³ (3.1 lb/cu.ft.)
Upper Comfort Foam @ Head/Feet Density vs. Reference
2.3
0.8
Upper Comfort Foam @ Lumbar
744 kg/m³ (46.4 lb/cu.ft.)
50 kg/m³ (3.1 lb/cu.ft.)
Upper Comfort Foam @ Lumbar Density vs. Reference
2.3
0.8
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
27 kg/m³ (1.7 lb/cu.ft.)
36 kg/m³ (2.3 lb/cu.ft.)
Transition Foam Density vs. Reference
0.8
1.4
Support Foam
32 kg/m³ (2.0 lb/cu.ft.)
28 kg/m³ (1.8 lb/cu.ft.)
Support Foam Density vs Reference
1.1
0.9
Foam Layer Thickness
Foam Layer Thickness Picture
Quilted Top
N/A
N/A
Upper Comfort Foam @ Head/Feet
5.1 cm (2.0")
7.5 cm (3.0")
Upper Comfort Foam @ Lumbar
5.1 cm (2.0")
7.5 cm (3.0")
Lower Comfort Foam @ Head/Feet
N/A
N/A
Lower Comfort Foam @ Lumbar
N/A
N/A
Transition Foam
8.4 cm (3.3")
7.0 cm (2.8")
Support Foam
10.1 cm (4.0")
21.0 cm (8.3")
Spring Layer Dimensions
Spring Layer Height Picture
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
N/A
Support Layer Coil Density
N/A
N/A
Support Layer Coil Gauge @ Head/Feet
N/A
N/A
Support Layer Coil Gauge @ Lumbar
N/A
N/A
Foam Layer Firmness
Comfort Layer IPD
Transition & Support Layer IPD
Quilted Top Fill 25% IPD
N/A
N/A
Upper Comfort Foam @ Head/Feet 25% IPD
2.7 kPa
2.0 kPa
Upper Comfort Foam @ Lumbar 25% IPD
2.7 kPa
2.0 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
2.4 kPa
3.0 kPa
Support Foam 25% IPD
4.1 kPa
4.1 kPa
Spring Layer Firmness
Comfort Layer Firmness
Support Layer Firmness
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
N/A
Normalized Support Layer Stiffness @ Lumbar
N/A
N/A
Foam Layer Resilience
Foam Layer Resilience Video
Quilted Top Fill
N/A
N/A
Upper Comfort Foam @ Head/Feet
N/A
4%
Upper Comfort Foam @ Lumbar
N/A
4%
Lower Comfort Foam @ Head/Feet
N/A
N/A
Lower Comfort Foam @ Lumbar
N/A
N/A
Transition Foam
49%
40%
Support Foam
43%
43%
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
N/A
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Queen
Mattress
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Purple
Queen
ComfortGrande Plus
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Novaform
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Purple Mattress
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Purple Mattress vs Novaform ComfortGrande Plus: Main Discussion
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