Products
Tested using Methodology v1.2
Updated Aug 10, 2026 05:54 PM
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Tested using Methodology v1.2
Updated Aug 13, 2026 04:48 PM
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Mattress Type
Foam
Bed-In-A-Box
Yes
Upper Comfort Foam @ LumbarElastic Polymer Grid
Firmness Level
Medium-Firm (51 Pa/mm)
Mattress Type
Hybrid
Bed-In-A-Box
Yes
Upper Comfort Foam @ LumbarMemory Foam
Firmness Level
Medium (44 Pa/mm)
Our Verdict
Purple Mattress
Helix Midnight Luxe 2025
The Purple Mattress and Helix Midnight Luxe 2025 have different strengths, and you might prefer either depending on your needs. The Helix is a more versatile hybrid mattress with at least satisfactory performance for most body types and sleeping positions. It offers better motion dissipation, so it's a good choice if you sleep with a partner. The all-foam Purple is much more cooling, with an exceptional performance that makes it worth considering if sleeping hot is a problem for you. You might also prefer its less enveloping feel.
Variants
- Mattress (California King)
- Mattress (Full)
- Midnight Luxe 2025 (California King)
- Midnight Luxe 2025 (Full)
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California King
Mattress
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California King
Midnight Luxe 2025
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Amazon
Full
Mattress
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Amazon
Full
Midnight Luxe 2025
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Helix
King
Mattress
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Amazon
King
Midnight Luxe 2025
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Helix
Queen
Mattress
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Amazon
Queen
Midnight Luxe 2025
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Helix
Twin
Mattress
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Amazon
Twin
Midnight Luxe 2025
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Twin XL
Mattress
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Amazon
Twin XL
Midnight Luxe 2025
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Amazon
Main Differences for
Side Sleeping
Side Sleeping
Threshold
Side Sleeping
6.3
8.2
Full Comparison
Design
Style
Style Picture
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Mattress Type
Foam
Hybrid
Bed-In-A-Box
Yes
Yes
Quilted Top Layer
No
Yes
Grab Handles
No
Yes
Thickness
23.4 cm (9.2")
34.8 cm (13.7")
Performance
Firmness
Head/Feet Firmness
Preview Graph
Preview Graph
Lumbar Firmness
Preview Graph
Preview Graph
Firmness Video
Normalized Stiffness @ Head/Feet
46 Pa/mm
41 Pa/mm
Normalized Stiffness @ Lumbar
51 Pa/mm
44 Pa/mm
Firmness Level
Medium-Firm (51 Pa/mm)
Medium (44 Pa/mm)
Body Conformity
6.2
8.3
Shoulder Indentation vs. Body Weight
Preview Graph
Preview Graph
Body Conformity Picture
Indent @ 50 kg (110 lb)
27 mm (1.1")
55 mm (2.2")
Indent @ 80 kg (176 lb)
59 mm (2.3")
83 mm (3.3")
Indent @ 110 kg (242 lb)
80 mm (3.2")
105 mm (4.1")
Support
6.6
7.2
Pelvis Indentation vs. Body Weight
Preview Graph
Preview Graph
Indent Difference @ 50 kg (110 lb)
10 mm (0.4")
18 mm (0.7")
Indent Difference @ 80 kg (176 lb)
31 mm (1.2")
22 mm (0.9")
Indent Difference @ 110 kg (242 lb)
31 mm (1.2")
22 mm (0.9")
Bounciness
7.1
7.4
Bounciness Video
Maximum Rebound Height
13.5 cm (5.3")
15.0 cm (5.9")
Comfort Layers Envelopment
6.8
8.0
Sinking & Contouring Picture
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Sinking Depth
3.5 cm (1.4")
5.3 cm (2.1")
Diameter Of Distortion
22.7 cm (8.9")
27.0 cm (10.6")
Responsiveness
9.8
8.4
Responsiveness Video
Response Time
0.2 s
0.7 s
Motion Isolation
7.7
8.2
Motion Isolation Video
Head/Feet Motion Isolation
Preview Graph
Preview Graph
Lumbar Motion Isolation
Preview Graph
Preview Graph
Peak Acceleration @ Head/Feet
0.84 g
0.88 g
Dissipation Time @ Head/Feet
0.51 s
0.53 s
Peak Acceleration @ Lumbar
4.05 g
1.94 g
Dissipation Time @ Lumbar
0.42 s
0.61 s
Edge Support
7.3
9.0
Naturalistic Loading Pad Video
Naturalistic Loading Pad
Preview Graph
Preview Graph
Small Platen
Preview Graph
Preview Graph
Naturalistic Loading Pad Indentation
133 mm
134 mm
Small Platen Indentation @ 0 mm From Edge
168 mm
147 mm
Small Platen Indentation @ 150 mm From Edge
135 mm
150 mm
Increased Indentation @ Mattress Edge
33 mm
-3 mm
Cooling
9.7
8.2
Cooling Graph
Preview Graph
Preview Graph
Energy Transferred Over 1st Hour
109 kJ
63 kJ
Energy Transferred Over 8 Hours
218 kJ
176 kJ
Components
Cover
Cover Picture
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Sleeping Surface Material
Polyester, Spandex
TENCEL
Removable
Yes
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
Memory Foam + Polyfoam + Fiber Fill
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
N/A
Foam Layer Mass Density
7.1
6.8
Quilted Top Fill
N/A
25 kg/m³ (1.6 lb/cu.ft.)
Quilted Top Fill Foam Density vs. Reference
N/A
0.7
Upper Comfort Foam @ Head/Feet
744 kg/m³ (46.4 lb/cu.ft.)
68 kg/m³ (4.2 lb/cu.ft.)
Upper Comfort Foam @ Head/Feet Density vs. Reference
2.3
1.1
Upper Comfort Foam @ Lumbar
744 kg/m³ (46.4 lb/cu.ft.)
68 kg/m³ (4.2 lb/cu.ft.)
Upper Comfort Foam @ Lumbar Density vs. Reference
2.3
1.1
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.)
30 kg/m³ (1.8 lb/cu.ft.)
Transition Foam Density vs. Reference
0.8
1.0
Support Foam
32 kg/m³ (2.0 lb/cu.ft.)
N/A
Support Foam Density vs Reference
1.1
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
5.1 cm (2.0")
5.1 cm (2.0")
Upper Comfort Foam @ Lumbar
5.1 cm (2.0")
5.1 cm (2.0")
Lower Comfort Foam @ Head/Feet
N/A
N/A
Lower Comfort Foam @ Lumbar
N/A
N/A
Transition Foam
8.4 cm (3.3")
2.5 cm (1.0")
Support Foam
10.1 cm (4.0")
N/A
Spring Layer Dimensions
Spring Layer Height Picture
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Compare High-Res
Spring Layer Density Picture
Compare High-Res
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
N/A
20.5 cm (8.1")
Support Layer Coil Density
N/A
248 coils/m² (23 coils/ft²)
Support Layer Coil Gauge @ Head/Feet
N/A
14 gauge
Support Layer Coil Gauge @ Lumbar
N/A
13 gauge
Foam Layer Firmness
Comfort Layer IPD
Preview Graph
Preview Graph
Transition & Support Layer IPD
Preview Graph
Preview Graph
Quilted Top Fill 25% IPD
N/A
1.4 kPa
Upper Comfort Foam @ Head/Feet 25% IPD
2.7 kPa
2.2 kPa
Upper Comfort Foam @ Lumbar 25% IPD
2.7 kPa
2.2 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
2.4 kPa
4.3 kPa
Support Foam 25% IPD
4.1 kPa
N/A
Spring Layer Firmness
Comfort Layer Firmness
Support Layer Firmness
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
N/A
81 Pa/mm
Normalized Support Layer Stiffness @ Lumbar
N/A
54 Pa/mm
Foam Layer Resilience
Foam Layer Resilience Video
Quilted Top Fill
N/A
45%
Upper Comfort Foam @ Head/Feet
N/A
2%
Upper Comfort Foam @ Lumbar
N/A
2%
Lower Comfort Foam @ Head/Feet
N/A
N/A
Lower Comfort Foam @ Lumbar
N/A
N/A
Transition Foam
49%
47%
Support Foam
43%
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
N/A
46.0 cm (18.1")
Check Price
California King
Mattress
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California King
Midnight Luxe 2025
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Amazon
Full
Mattress
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Amazon
Full
Midnight Luxe 2025
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Helix
King
Mattress
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Amazon
King
Midnight Luxe 2025
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Helix
Queen
Mattress
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Amazon
Queen
Midnight Luxe 2025
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Helix
Twin
Mattress
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Amazon
Twin
Midnight Luxe 2025
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Amazon
Twin XL
Mattress
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Amazon
Twin XL
Midnight Luxe 2025
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Amazon
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Purple Mattress
Helix Midnight Luxe 2025
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Purple Mattress vs Helix Midnight Luxe 2025: Main Discussion
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