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  1. Home
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  3. Compare

Novaform Serafina Pearl vs SweetNight CoolNest

Which Mattress Is Better?

    Top
    Main Differences
    Design
      Style
    Performance
      FirmnessBody ConformitySupportBouncinessComfort Layers EnvelopmentResponsivenessMotion IsolationEdge SupportCooling
    Components
      CoverEdge ConstructionFoam Layer MaterialFoam Layer Mass DensityFoam Layer ThicknessSpring Layer DimensionsFoam Layer FirmnessSpring Layer FirmnessFoam Layer ResilienceSpring Layer Bounciness
    Comments

Products

Novaform Serafina Pearl
SweetNight CoolNest

Tested using Methodology v1.2

Updated Sep 25, 2026 04:02 PM

SEE PRICE
Amazon

Tested using Methodology v1.2

Updated Sep 03, 2026 12:09 PM

SEE PRICE
Amazon
Novaform Serafina Pearl Picture

Track

SweetNight CoolNest Picture

Track

Mattress Type
Foam
Bed-In-A-Box
Yes
Upper Comfort Foam @ LumbarMemory Foam
Firmness Level
Medium (44 Pa/mm)
Mattress Type
Foam
Bed-In-A-Box
Yes
Upper Comfort Foam @ LumbarMemory Foam
Firmness Level
Medium-Plush (39 Pa/mm)
  1. Recommended in 3 articles:
  2. Back Pain
  3. Memory Foam
  4. Mattresses-In-A-Box

Our Verdict

Novaform Serafina Pearl

SweetNight CoolNest

The Novaform Serafina Pearl is better than the SweetNight CoolNest for most people. The Novaform's better support makes it much more versatile, as it works for a range of side, back, and stomach sleepers. It's also much more durable, since it only uses good-quality foam. The SweetNight isn't as versatile, but if it works for your body type and sleeping position, it's much more cooling and more suitable for hot sleepers. It's also more responsive, so it's not as likely to make you feel stuck in place. 

GIFT THIS COMPARISON

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Variants

  • Serafina Pearl (Plush) (King)
  • Serafina Pearl (Plush) (Queen)
  • CoolNest (14") (California King)
  • CoolNest (14") (Full)

Review

See Novaform Serafina Pearl Review
See SweetNight CoolNest Review
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0 

Check Price

 
California King
CoolNest (14")
SEE PRICE
Amazon
 
Full
CoolNest (14")
SEE PRICE
Amazon
King
Serafina Pearl (Plush)
SEE PRICE
Novaform
King
CoolNest (14")
SEE PRICE
Amazon
Queen
Serafina Pearl (Plush)
SEE PRICE
Amazon
Queen
CoolNest (14")
SEE PRICE
Amazon
 
Twin
CoolNest (14")
SEE PRICE
SweetNight

Main Differences for
Side Sleeping

Threshold 

0.10

Side Sleeping 
 

7.8
8.0
No major differences between these mattresses for side sleeping. See full list of tests below.

Full Comparison

Design

Style 
 

Style Picture 
 

Compare High-Res
Novaform Serafina Pearl Style Picture
Compare High-Res
SweetNight CoolNest Style Picture

Mattress Type 
 

Foam
Foam

Bed-In-A-Box 
 

Yes
Yes

Quilted Top Layer 
 

No
No

Grab Handles 
 

Yes
No

Thickness  

35.8 cm (14.1")
34.5 cm (13.6")
Performance

Firmness 
 

Head/Feet Firmness  

 Preview Graph
Novaform Serafina Pearl Head/Feet Firmness
 Preview Graph
SweetNight CoolNest Head/Feet Firmness
 Compare in Graph Tool

Lumbar Firmness  

 Preview Graph
Novaform Serafina Pearl Lumbar Firmness
 Preview Graph
SweetNight CoolNest Lumbar Firmness
 Compare in Graph Tool

Firmness Video  

Normalized Stiffness @ Head/Feet 
 

42 Pa/mm
39 Pa/mm

Normalized Stiffness @ Lumbar 
 

44 Pa/mm
39 Pa/mm

Firmness Level 
 

Medium (44 Pa/mm)
Medium-Plush (39 Pa/mm)

Body Conformity 
 

8.2
8.2

Shoulder Indentation vs. Body Weight  

 Preview Graph
Novaform Serafina Pearl Shoulder Indentation vs. Body Weight
 Preview Graph
SweetNight CoolNest Shoulder Indentation vs. Body Weight
 Compare in Graph Tool

Body Conformity Picture 1  

SweetNight CoolNest Body Conformity Picture 1

Body Conformity Picture 2  

SweetNight CoolNest Body Conformity Picture 2

Indent @ 50 kg (110 lb) 
 

55 mm (2.2")
52 mm (2.0")

Indent @ 80 kg (176 lb) 
 

79 mm (3.1")
79 mm (3.1")

Indent @ 110 kg (242 lb) 
 

97 mm (3.8")
113 mm (4.4")

Support 
 

7.3
6.0

Pelvis Indentation vs. Body Weight  

 Preview Graph
Novaform Serafina Pearl Pelvis Indentation vs. Body Weight
 Preview Graph
SweetNight CoolNest Pelvis Indentation vs. Body Weight
 Compare in Graph Tool

Indent Difference @ 50 kg (110 lb) 
 

19 mm (0.7")
24 mm (0.9")

Indent Difference @ 80 kg (176 lb) 
 

19 mm (0.8")
28 mm (1.1")

Indent Difference @ 110 kg (242 lb) 
 

20 mm (0.8")
39 mm (1.5")

Bounciness 
 

2.2
6.3

Bounciness Video  

Maximum Rebound Height 
 

2.0 cm (0.8")
9.0 cm (3.5")

Comfort Layers Envelopment 
 

6.6
8.4

Sinking & Contouring Picture 
 

Compare High-Res
Novaform Serafina Pearl Sinking & Contouring Picture
Compare High-Res
SweetNight CoolNest Sinking & Contouring Picture

Sinking Depth 
 

5.4 cm (2.1")
5.0 cm (2.0")

Diameter Of Distortion 
 

31.8 cm (12.5")
24.9 cm (9.8")

Responsiveness 
 

7.7
8.8

Responsiveness Video  

Response Time 
 

1.0 s
0.6 s

Motion Isolation 
 

8.4
8.2

Motion Isolation Video  

Head/Feet Motion Isolation  

 Preview Graph
Novaform Serafina Pearl Head/Feet Motion Isolation
 Preview Graph
SweetNight CoolNest Head/Feet Motion Isolation
 Compare in Graph Tool

Lumbar Motion Isolation  

 Preview Graph
Novaform Serafina Pearl Lumbar Motion Isolation
 Preview Graph
SweetNight CoolNest Lumbar Motion Isolation
 Compare in Graph Tool

Peak Acceleration @ Head/Feet 
 

0.70 g
0.35 g

Dissipation Time @ Head/Feet 
 

0.32 s
0.36 s

Peak Acceleration @ Lumbar 
 

3.25 g
3.80 g

Dissipation Time @ Lumbar 
 

0.32 s
0.33 s

Edge Support 
 

6.9
5.7

Naturalistic Loading Pad Video  

Naturalistic Loading Pad  

 Preview Graph
Novaform Serafina Pearl Naturalistic Loading Pad
 Preview Graph
SweetNight CoolNest Naturalistic Loading Pad
 Compare in Graph Tool

Small Platen  

 Preview Graph
Novaform Serafina Pearl Small Platen
 Preview Graph
SweetNight CoolNest Small Platen
 Compare in Graph Tool

Naturalistic Loading Pad Indentation 
 

156 mm
186 mm

Small Platen Indentation @ 0 mm From Edge 
 

177 mm
205 mm

Small Platen Indentation @ 150 mm From Edge 
 

150 mm
172 mm

Increased Indentation @ Mattress Edge 
 

27 mm
32 mm

Cooling 
 

7.9
8.4

Cooling Graph  

 Preview Graph
Novaform Serafina Pearl Cooling Graph
 Preview Graph
SweetNight CoolNest Cooling Graph
 Compare in Graph Tool

Energy Transferred Over 1st Hour 
 

63 kJ
68 kJ

Energy Transferred Over 8 Hours 
 

164 kJ
177 kJ
Components

Cover 
 

Cover Picture 
 

Compare High-Res
Novaform Serafina Pearl Cover Picture
Compare High-Res
SweetNight CoolNest Cover Picture

Sleeping Surface Material 
 

Polyester, Nylon, Polyethylene
Polyester

Removable 
 

No
Yes

Machine Washable 
 

No
No

Edge Construction 
 

Edge Support Picture 
 

Compare High-Res
Novaform Serafina Pearl Edge Support Picture
Compare High-Res
SweetNight CoolNest Edge Support Picture

Edge Component 
 

None
None

Foam Layer Material 
 

Foam Layer Material Picture 
 

Compare High-Res
Novaform Serafina Pearl Foam Layer Material Picture
Compare High-Res
SweetNight CoolNest Foam Layer Material Picture

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  

N/A
Memory Foam

Lower Comfort Foam @ Lumbar  

N/A
Memory Foam

Transition Foam  

Polyfoam
Polyfoam

Support Foam  

Polyfoam
Polyfoam

Foam Layer Mass Density 
 

6.8
5.5

Quilted Top Fill  

N/A
N/A

Quilted Top Fill Foam Density vs. Reference 
 

N/A
N/A

Upper Comfort Foam @ Head/Feet  

50 kg/m³ (3.1 lb/cu.ft.)
51 kg/m³ (3.2 lb/cu.ft.)

Upper Comfort Foam @ Head/Feet Density vs. Reference 
 

0.8
0.8

Upper Comfort Foam @ Lumbar  

50 kg/m³ (3.1 lb/cu.ft.)
51 kg/m³ (3.2 lb/cu.ft.)

Upper Comfort Foam @ Lumbar Density vs. Reference 
 

0.8
0.8

Lower Comfort Foam @ Head/Feet  

N/A
27 kg/m³ (1.7 lb/cu.ft.)

Lower Comfort Foam @ Head/Feet Density vs. Reference 
 

N/A
0.4

Lower Comfort Foam @ Lumbar  

N/A
27 kg/m³ (1.7 lb/cu.ft.)

Lower Comfort Foam @ Lumbar Density vs. Reference 
 

N/A
0.4

Transition Foam  

35 kg/m³ (2.2 lb/cu.ft.)
27 kg/m³ (1.7 lb/cu.ft.)

Transition Foam Density vs. Reference 
 

1.3
0.8

Support Foam  

28 kg/m³ (1.7 lb/cu.ft.)
24 kg/m³ (1.5 lb/cu.ft.)

Support Foam Density vs Reference 
 

0.9
0.6

Foam Layer Thickness 
 

Foam Layer Thickness Picture 
 

Compare High-Res
Novaform Serafina Pearl Foam Layer Thickness Picture
Compare High-Res
SweetNight CoolNest Foam Layer Thickness Picture

Quilted Top 
 

N/A
N/A

Upper Comfort Foam @ Head/Feet  

7.3 cm (2.9")
2.5 cm (1.0")

Upper Comfort Foam @ Lumbar  

7.3 cm (2.9")
2.5 cm (1.0")

Lower Comfort Foam @ Head/Feet  

N/A
5.0 cm (2.0")

Lower Comfort Foam @ Lumbar  

N/A
5.0 cm (2.0")

Transition Foam  

7.5 cm (3.0")
14.5 cm (5.7")

Support Foam  

21.0 cm (8.3")
12.5 cm (4.9")

Spring Layer Dimensions 
 

Spring Layer Height Picture 
 

Compare High-Res
Novaform Serafina Pearl Spring Layer Height Picture
Compare High-Res
SweetNight CoolNest Spring Layer Height Picture

Spring Layer Density Picture 
 

Compare High-Res
Novaform Serafina Pearl Spring Layer Density Picture
Compare High-Res
SweetNight CoolNest Spring Layer Density Picture

Comfort Layer Height 
 

N/A
N/A

Comfort Layer Coil Density 
 

N/A

Comfort Layer Coil Gauge 
 

N/A
N/A

Support Layer Height 
 

N/A
N/A

Support Layer Coil Density 
 

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  

 Preview Graph
Novaform Serafina Pearl Comfort Layer IPD
 Compare in Graph Tool

Transition & Support Layer IPD  

 Preview Graph
Novaform Serafina Pearl Transition & Support Layer IPD
 Compare in Graph Tool

Quilted Top Fill 25% IPD 
 

N/A

Upper Comfort Foam @ Head/Feet 25% IPD 
 

1.8 kPa

Upper Comfort Foam @ Lumbar 25% IPD 
 

1.8 kPa

Lower Comfort Foam @ Head/Feet 25% IPD 
 

N/A

Lower Comfort Foam @ Lumbar 25% IPD 
 

N/A

Transition Foam 25% IPD 
 

1.9 kPa

Support Foam 25% IPD 
 

3.7 kPa

Spring Layer Firmness 
 

Comfort Layer Firmness  

Novaform Serafina Pearl Comfort Layer Firmness
 Compare in Graph Tool

Support Layer Firmness  

Novaform Serafina Pearl Support Layer Firmness
 Compare in Graph Tool

Spring Layer Firmness  

Normalized Comfort Layer Stiffness @ Head/Feet 
 

N/A

Normalized Comfort Layer Stiffness @ Lumbar 
 

N/A

Normalized Support Layer Stiffness @ Head/Feet 
 

N/A

Normalized Support Layer Stiffness @ Lumbar 
 

N/A

Foam Layer Resilience 
 

Foam Layer Resilience Video  

Quilted Top Fill  

N/A
N/A

Upper Comfort Foam @ Head/Feet  

2%
16%

Upper Comfort Foam @ Lumbar  

2%
16%

Lower Comfort Foam @ Head/Feet  

N/A
4%

Lower Comfort Foam @ Lumbar  

N/A
4%

Transition Foam  

15%
43%

Support Foam  

46%
46%

Spring Layer Bounciness 
 

Comfort Spring Layer Bounciness Video  

Support Spring Layer Bounciness Video  

Comfort Spring Layer Maximum Rebound Height 
 

N/A

Support Spring Layer Maximum Rebound Height 
 

N/A

Check Price

 
California King
CoolNest (14")
SEE PRICE
Amazon
 
Full
CoolNest (14")
SEE PRICE
Amazon
King
Serafina Pearl (Plush)
SEE PRICE
Novaform
King
CoolNest (14")
SEE PRICE
Amazon
Queen
Serafina Pearl (Plush)
SEE PRICE
Amazon
Queen
CoolNest (14")
SEE PRICE
Amazon
 
Twin
CoolNest (14")
SEE PRICE
SweetNight
Back to Top

Novaform Serafina Pearl

SweetNight CoolNest

Comments

  1. Comparison
 • Posted 1 month ago

Novaform Serafina Pearl vs SweetNight CoolNest: Main Discussion

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