Products
Tested using Methodology v1.2
Updated Mar 25, 2026 04:57 PM
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Casper
Tested using Methodology v1.2
Updated Apr 01, 2026 08:51 PM
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Mattress Type
Hybrid
Bed-In-A-Box
Yes
Upper Comfort Foam @ LumbarMemory Foam
Firmness Level
Medium (47 Pa/mm)
Mattress Type
Hybrid
Bed-In-A-Box
Yes
Upper Comfort Foam @ LumbarPolyfoam
Firmness Level
Firm (66 Pa/mm)
Our Verdict
Casper Snow
Plank Firm Luxe
You might prefer either the Casper Snow or Plank Firm Luxe. The Plank is firm and supportive, making it a good option for many back/stomach sleepers, especially because it's flippable, and the other side has an even firmer feel. Its much more responsive feel makes it easier to move around on, and its edges are much sturdier. The Casper's enveloping comfort layers give it a much better pressure relief performance, so it's more suitable for side sleeping or back/stomach sleepers who want a plusher feel. It's also much more cooling.
Variants
- Snow (Queen)
- Firm Luxe (Queen)
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Queen
Snow
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Casper
Queen
Firm Luxe
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Amazon.com
Main Differences for
Side Sleeping
Side Sleeping
Threshold
Side Sleeping
8.3
6.5
Full Comparison
Design
Style
Style Picture
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Mattress Type
Hybrid
Hybrid
Bed-In-A-Box
Yes
Yes
Quilted Top Layer
No
Yes
Grab Handles
No
No
Thickness
30.5 cm (12.0")
34.9 cm (13.7")
Performance
Firmness
Head/Feet Firmness
Preview Graph
Preview Graph
Lumbar Firmness
Preview Graph
Preview Graph
Firmness Video
Normalized Stiffness @ Head/Feet
56 Pa/mm
74 Pa/mm
Normalized Stiffness @ Lumbar
47 Pa/mm
66 Pa/mm
Firmness Level
Medium (47 Pa/mm)
Firm (66 Pa/mm)
Body Conformity
8.4
6.1
Shoulder Indentation vs. Body Weight
Preview Graph
Preview Graph
Indent @ 50 kg (110 lb)
62 mm (2.5")
36 mm (1.4")
Indent @ 80 kg (176 lb)
80 mm (3.2")
51 mm (2.0")
Indent @ 110 kg (242 lb)
96 mm (3.8")
67 mm (2.6")
Support
8.6
7.6
Pelvis Indentation vs. Body Weight
Preview Graph
Preview Graph
Indent Difference @ 50 kg (110 lb)
0 mm (0.0")
10 mm (0.4")
Indent Difference @ 80 kg (176 lb)
7 mm (0.3")
16 mm (0.6")
Indent Difference @ 110 kg (242 lb)
13 mm (0.5")
22 mm (0.9")
Bounciness
7.1
8.7
Bounciness Video
Maximum Rebound Height
13.0 cm (5.1")
26.0 cm (10.2")
Comfort Layers Envelopment
7.7
7.6
Sinking & Contouring Picture
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Sinking Depth
5.6 cm (2.2")
4.3 cm (1.7")
Diameter Of Distortion
28.3 cm (11.1")
24.1 cm (9.5")
Responsiveness
4.5
9.7
Responsiveness Video
Response Time
3.1 s
0.2 s
Motion Isolation
8.5
8.9
Motion Isolation Video
Head/Feet Motion Isolation
Preview Graph
Preview Graph
Lumbar Motion Isolation
Preview Graph
Preview Graph
Peak Acceleration @ Head/Feet
0.56 g
1.00 g
Dissipation Time @ Head/Feet
0.33 s
0.52 s
Peak Acceleration @ Lumbar
2.91 g
1.31 g
Dissipation Time @ Lumbar
0.32 s
0.39 s
Edge Support
6.0
9.6
Naturalistic Loading Pad Video
Naturalistic Loading Pad
Preview Graph
Preview Graph
Small Platen
Preview Graph
Preview Graph
Naturalistic Loading Pad Indentation
149 mm
105 mm
Small Platen Indentation @ 0 mm From Edge
194 mm
129 mm
Small Platen Indentation @ 150 mm From Edge
148 mm
116 mm
Increased Indentation @ Mattress Edge
46 mm
13 mm
Cooling
8.9
7.7
Cooling Graph
Preview Graph
Preview Graph
Energy Transferred Over 1st Hour
71 kJ
56 kJ
Energy Transferred Over 8 Hours
198 kJ
163 kJ
Components
Cover
Cover Picture
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Sleeping Surface Material
Polyester, Polyethylene, Spandex
Not Provided by Manufacturer
Removable
No
No
Machine Washable
No
No
Edge Construction
Edge Support Picture
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Edge Component
Polyfoam
Pocket Coils
Foam Layer Material
Foam Layer Material Picture
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Quilted Top Fill
N/A
Polyfoam + Fiber Fill
Upper Comfort Foam @ Head/Feet
Memory Foam
Polyfoam
Upper Comfort Foam @ Lumbar
Memory Foam
Polyfoam
Lower Comfort Foam @ Head/Feet
Memory Foam
N/A
Lower Comfort Foam @ Lumbar
Memory Foam
N/A
Transition Foam
N/A
Polyfoam
Support Foam
N/A
N/A
Foam Layer Mass Density
5.3
6.8
Quilted Top Fill
N/A
24 kg/m³ (1.5 lb/cu.ft.)
Quilted Top Fill Foam Density vs. Reference
N/A
0.6
Upper Comfort Foam @ Head/Feet
40 kg/m³ (2.5 lb/cu.ft.)
41 kg/m³ (2.5 lb/cu.ft.)
Upper Comfort Foam @ Head/Feet Density vs. Reference
0.6
1.7
Upper Comfort Foam @ Lumbar
40 kg/m³ (2.5 lb/cu.ft.)
41 kg/m³ (2.5 lb/cu.ft.)
Upper Comfort Foam @ Lumbar Density vs. Reference
0.6
1.7
Lower Comfort Foam @ Head/Feet
38 kg/m³ (2.4 lb/cu.ft.)
N/A
Lower Comfort Foam @ Head/Feet Density vs. Reference
0.6
N/A
Lower Comfort Foam @ Lumbar
41 kg/m³ (2.6 lb/cu.ft.)
N/A
Lower Comfort Foam @ Lumbar Density vs. Reference
0.6
N/A
Transition Foam
N/A
29 kg/m³ (1.8 lb/cu.ft.)
Transition Foam Density vs. Reference
N/A
0.9
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
N/A
5.0 cm (2.0")
Upper Comfort Foam @ Head/Feet
2.7 cm (1.1")
2.5 cm (1.0")
Upper Comfort Foam @ Lumbar
2.7 cm (1.1")
2.5 cm (1.0")
Lower Comfort Foam @ Head/Feet
5.0 cm (2.0")
N/A
Lower Comfort Foam @ Lumbar
5.0 cm (2.0")
N/A
Transition Foam
N/A
5.0 cm (2.0")
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
16.8 cm (6.6")
16.0 cm (6.3")
Support Layer Coil Density
277 coils/m² (26 coils/ft²)
230 coils/m² (21 coils/ft²)
Support Layer Coil Gauge @ Head/Feet
14 gauge
13 gauge
Support Layer Coil Gauge @ Lumbar
14 gauge
13 gauge
Foam Layer Firmness
Comfort Layer IPD
Preview Graph
Preview Graph
Transition & Support Layer IPD
Preview Graph
Quilted Top Fill 25% IPD
N/A
1.8 kPa
Upper Comfort Foam @ Head/Feet 25% IPD
1.0 kPa
3.9 kPa
Upper Comfort Foam @ Lumbar 25% IPD
1.0 kPa
3.9 kPa
Lower Comfort Foam @ Head/Feet 25% IPD
1.0 kPa
N/A
Lower Comfort Foam @ Lumbar 25% IPD
1.9 kPa
N/A
Transition Foam 25% IPD
N/A
5.9 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
97 Pa/mm
107 Pa/mm
Normalized Support Layer Stiffness @ Lumbar
93 Pa/mm
92 Pa/mm
Foam Layer Resilience
Foam Layer Resilience Video
Quilted Top Fill
N/A
54%
Upper Comfort Foam @ Head/Feet
2%
19%
Upper Comfort Foam @ Lumbar
2%
19%
Lower Comfort Foam @ Head/Feet
1%
N/A
Lower Comfort Foam @ Lumbar
5%
N/A
Transition Foam
N/A
49%
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
37.5 cm (14.8")
47.0 cm (18.5")
Check Price
Queen
Snow
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Casper
Queen
Firm Luxe
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Casper Snow
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Comments
Casper Snow vs Plank Firm Luxe: Main Discussion
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