Products
Tested using Methodology v1.2
Updated Sep 03, 2026 12:09 PM
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Tested using Methodology v1.2
Updated Sep 17, 2026 02:59 PM
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Mattress Type
Foam
Bed-In-A-Box
Yes
Upper Comfort Foam @ LumbarMemory Foam
Firmness Level
Medium-Plush (39 Pa/mm)
Mattress Type
Foam
Bed-In-A-Box
Yes
Upper Comfort Foam @ LumbarMemory Foam
Firmness Level
Medium (47 Pa/mm)
Our Verdict
SweetNight CoolNest
SweetNight CoolNest Ultra
The SweetNight CoolNest and SweetNight CoolNest Ultra have different strengths. The CoolNest is a Medium-Plush mattress that you'll sink further into, so it offers better pressure relief for side sleepers. It's much more responsive and feels easier to move around on. The Ultra is a firmer Medium mattress. It doesn't offer quite as much pressure relief for side sleepers, but it's more supportive and a better option for combination or back/stomach sleeping. Its better motion isolation and edge support makes it better for couples, and it has a more durable design.
Variants
- CoolNest (14") (California King)
- CoolNest (14") (Full)
- CoolNest Ultra (16") (King)
- CoolNest Ultra (16") (Queen)
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California King
CoolNest (14")
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Amazon
Full
CoolNest (14")
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Amazon
King
CoolNest (14")
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Amazon
King
CoolNest Ultra (16")
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Amazon
Queen
CoolNest (14")
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Amazon
Queen
CoolNest Ultra (16")
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Amazon
Twin
CoolNest (14")
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SweetNight
Main Differences for
Side Sleeping
Side Sleeping
Threshold
Side Sleeping
8.0
7.6
Full Comparison
Design
Style
Style Picture
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Mattress Type
Foam
Foam
Bed-In-A-Box
Yes
Yes
Quilted Top Layer
No
No
Grab Handles
No
No
Thickness
34.5 cm (13.6")
39.8 cm (15.7")
Performance
Firmness
Head/Feet Firmness
Preview Graph
Preview Graph
Lumbar Firmness
Preview Graph
Preview Graph
Firmness Video
Normalized Stiffness @ Head/Feet
39 Pa/mm
45 Pa/mm
Normalized Stiffness @ Lumbar
39 Pa/mm
47 Pa/mm
Firmness Level
Medium-Plush (39 Pa/mm)
Medium (47 Pa/mm)
Body Conformity
8.2
7.5
Shoulder Indentation vs. Body Weight
Preview Graph
Preview Graph
Body Conformity Picture 1
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Body Conformity Picture 2
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Indent @ 50 kg (110 lb)
52 mm (2.0")
46 mm (1.8")
Indent @ 80 kg (176 lb)
79 mm (3.1")
70 mm (2.8")
Indent @ 110 kg (242 lb)
113 mm (4.4")
88 mm (3.4")
Support
6.0
7.1
Pelvis Indentation vs. Body Weight
Preview Graph
Preview Graph
Indent Difference @ 50 kg (110 lb)
24 mm (0.9")
18 mm (0.7")
Indent Difference @ 80 kg (176 lb)
28 mm (1.1")
22 mm (0.9")
Indent Difference @ 110 kg (242 lb)
39 mm (1.5")
22 mm (0.9")
Bounciness
6.3
4.8
Bounciness Video
Maximum Rebound Height
9.0 cm (3.5")
5.0 cm (2.0")
Comfort Layers Envelopment
8.4
7.9
Sinking & Contouring Picture
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Sinking Depth
5.0 cm (2.0")
4.6 cm (1.8")
Diameter Of Distortion
24.9 cm (9.8")
25.5 cm (10.0")
Responsiveness
8.8
5.6
Responsiveness Video
Response Time
0.6 s
2.3 s
Motion Isolation
8.2
8.9
Motion Isolation Video
Head/Feet Motion Isolation
Preview Graph
Preview Graph
Lumbar Motion Isolation
Preview Graph
Preview Graph
Peak Acceleration @ Head/Feet
0.35 g
0.55 g
Dissipation Time @ Head/Feet
0.36 s
0.35 s
Peak Acceleration @ Lumbar
3.80 g
2.35 g
Dissipation Time @ Lumbar
0.33 s
0.27 s
Edge Support
5.7
7.1
Naturalistic Loading Pad Video
Naturalistic Loading Pad
Preview Graph
Preview Graph
Small Platen
Preview Graph
Preview Graph
Naturalistic Loading Pad Indentation
186 mm
158 mm
Small Platen Indentation @ 0 mm From Edge
205 mm
166 mm
Small Platen Indentation @ 150 mm From Edge
172 mm
143 mm
Increased Indentation @ Mattress Edge
32 mm
23 mm
Cooling
8.4
7.8
Cooling Graph
Preview Graph
Preview Graph
Energy Transferred Over 1st Hour
68 kJ
68 kJ
Energy Transferred Over 8 Hours
177 kJ
157 kJ
Components
Cover
Cover Picture
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Sleeping Surface Material
Polyester
Polyester
Removable
Yes
Yes
Machine Washable
No
No
Edge Construction
Edge Support Picture
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Edge Component
None
None
Foam Layer Material
Foam Layer Material Picture
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Quilted Top Fill
N/A
N/A
Upper Comfort Foam @ Head/Feet
Memory Foam
Memory Foam
Upper Comfort Foam @ Lumbar
Memory Foam
Memory Foam
Lower Comfort Foam @ Head/Feet
Memory Foam
Memory Foam
Lower Comfort Foam @ Lumbar
Memory Foam
Memory Foam
Transition Foam
Polyfoam
Polyfoam
Support Foam
Polyfoam
Polyfoam
Foam Layer Mass Density
5.5
6.0
Quilted Top Fill
N/A
N/A
Quilted Top Fill Foam Density vs. Reference
N/A
N/A
Upper Comfort Foam @ Head/Feet
51 kg/m³ (3.2 lb/cu.ft.)
54 kg/m³ (3.4 lb/cu.ft.)
Upper Comfort Foam @ Head/Feet Density vs. Reference
0.8
0.8
Upper Comfort Foam @ Lumbar
51 kg/m³ (3.2 lb/cu.ft.)
54 kg/m³ (3.4 lb/cu.ft.)
Upper Comfort Foam @ Lumbar Density vs. Reference
0.8
0.8
Lower Comfort Foam @ Head/Feet
27 kg/m³ (1.7 lb/cu.ft.)
48 kg/m³ (3.0 lb/cu.ft.)
Lower Comfort Foam @ Head/Feet Density vs. Reference
0.4
0.8
Lower Comfort Foam @ Lumbar
27 kg/m³ (1.7 lb/cu.ft.)
48 kg/m³ (3.0 lb/cu.ft.)
Lower Comfort Foam @ Lumbar Density vs. Reference
0.4
0.8
Transition Foam
27 kg/m³ (1.7 lb/cu.ft.)
33 kg/m³ (2.1 lb/cu.ft.)
Transition Foam Density vs. Reference
0.8
0.5
Support Foam
24 kg/m³ (1.5 lb/cu.ft.)
30 kg/m³ (1.9 lb/cu.ft.)
Support Foam Density vs Reference
0.6
1.0
Foam Layer Thickness
Foam Layer Thickness Picture
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Quilted Top
N/A
N/A
Upper Comfort Foam @ Head/Feet
2.5 cm (1.0")
2.5 cm (1.0")
Upper Comfort Foam @ Lumbar
2.5 cm (1.0")
2.5 cm (1.0")
Lower Comfort Foam @ Head/Feet
5.0 cm (2.0")
1.0 cm (0.4")
Lower Comfort Foam @ Lumbar
5.0 cm (2.0")
1.0 cm (0.4")
Transition Foam
14.5 cm (5.7")
6.5 cm (2.6")
Support Foam
12.5 cm (4.9")
28.0 cm (11.0")
Spring Layer Dimensions
Spring Layer Height Picture
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Spring Layer Density Picture
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Comfort Layer Height
N/A
N/A
Comfort Layer Coil Density
Comfort Layer Coil Gauge
N/A
N/A
Support Layer Height
N/A
N/A
Support Layer Coil Density
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
Upper Comfort Foam @ Head/Feet 25% IPD
Upper Comfort Foam @ Lumbar 25% IPD
Lower Comfort Foam @ Head/Feet 25% IPD
Lower Comfort Foam @ Lumbar 25% IPD
Transition Foam 25% IPD
Support Foam 25% IPD
Spring Layer Firmness
Comfort Layer Firmness
Support Layer Firmness
Spring Layer Firmness
Normalized Comfort Layer Stiffness @ Head/Feet
Normalized Comfort Layer Stiffness @ Lumbar
Normalized Support Layer Stiffness @ Head/Feet
Normalized Support Layer Stiffness @ Lumbar
Foam Layer Resilience
Foam Layer Resilience Video
Quilted Top Fill
N/A
N/A
Upper Comfort Foam @ Head/Feet
16%
11%
Upper Comfort Foam @ Lumbar
16%
11%
Lower Comfort Foam @ Head/Feet
4%
7%
Lower Comfort Foam @ Lumbar
4%
7%
Transition Foam
43%
4%
Support Foam
46%
38%
Spring Layer Bounciness
Comfort Spring Layer Bounciness Video
Support Spring Layer Bounciness Video
Comfort Spring Layer Maximum Rebound Height
Support Spring Layer Maximum Rebound Height
Check Price
California King
CoolNest (14")
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Full
CoolNest (14")
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King
CoolNest (14")
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Amazon
King
CoolNest Ultra (16")
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Amazon
Queen
CoolNest (14")
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Amazon
Queen
CoolNest Ultra (16")
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Amazon
Twin
CoolNest (14")
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SweetNight
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SweetNight CoolNest
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Comments
SweetNight CoolNest vs SweetNight CoolNest Ultra: Main Discussion
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