SweetNight CoolNest Ultra vs Silk & Snow Mattress: Which Mattress Is Better?

Tested using Methodology v1.2

Updated Sep 17, 2026 02:59 PM

See Silk & Snow Mattress Review

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)

Recommended in 5 articles:
Mattresses
Side Sleepers
Mattresses-In-A-Box
2

Our Verdict

Silk & Snow Mattress

SweetNight CoolNest Ultra

You might prefer either the Silk & Snow Mattress or the SweetNight CoolNest Ultra. The Silk & Snow is a better option overall for lighter people, since it offers better support and better pressure relief for people in that weight category. It has better motion dissipation, so your partner's movements won't be as noticeable, and it's more responsive, so it feels easier to move around on. You might prefer the SweetNight if you like hugging, slow-moving memory foam. It's more supportive for heavier individuals and has sturdier edge support.

Variants

Mattress (Plush) (California King)
Mattress (Plush) (Full)

CoolNest Ultra (16") (King)
CoolNest Ultra (16") (Queen)

Review

See SweetNight CoolNest Ultra Review

Check Price

California King

Mattress (Plush)

Full

Mattress (Plush)

King

Mattress (Plush)

King

CoolNest Ultra (16")

Queen

Mattress (Plush)

Queen

CoolNest Ultra (16")

Twin

Mattress (Plush)

Twin XL

Mattress (Plush)

Main Differences for

Side Sleeping

Threshold

0.10

Side Sleeping

8.1

7.6

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

Full Comparison

Side Sleeping

8.1

7.6

Back Sleeping

7.3

Stomach Sleeping

7.1

Firmness

Longevity

6.7

6.0

Pressure Relief

8.2

7.6

Support

7.0

7.1

Cooling

8.1

7.8

Motion Dissipation

9.4

8.9

Responsiveness

7.7

5.4

Edge Support

7.1

Design

Style

Style Picture

Compare High-Res

Mattress Type

Foam

Bed-In-A-Box

Yes

Quilted Top Layer

Grab Handles

Thickness

29.2 cm (11.5")

39.8 cm (15.7")

Performance

Firmness

Head/Feet Firmness

Preview Graph

SweetNight CoolNest Ultra Head/Feet Firmness

Lumbar Firmness

Preview Graph

SweetNight CoolNest Ultra Lumbar Firmness

Firmness Video

Normalized Stiffness @ Head/Feet

38 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

8.7

7.5

Shoulder Indentation vs. Body Weight

Preview Graph

SweetNight CoolNest Ultra Shoulder Indentation vs. Body Weight

Body Conformity Picture 1

Body Conformity Picture 2

Indent @ 50 kg (110 lb)

63 mm (2.5")

46 mm (1.8")

Indent @ 80 kg (176 lb)

91 mm (3.6")

70 mm (2.8")

Indent @ 110 kg (242 lb)

119 mm (4.7")

88 mm (3.4")

Support

7.0

7.1

Pelvis Indentation vs. Body Weight

Preview Graph

SweetNight CoolNest Ultra Pelvis Indentation vs. Body Weight

Indent Difference @ 50 kg (110 lb)

17 mm (0.6")

18 mm (0.7")

Indent Difference @ 80 kg (176 lb)

21 mm (0.8")

22 mm (0.9")

Indent Difference @ 110 kg (242 lb)

27 mm (1.1")

22 mm (0.9")

Bounciness

2.2

4.8

Bounciness Video

Maximum Rebound Height

2.0 cm (0.8")

5.0 cm (2.0")

Comfort Layers Envelopment

6.3

7.9

Sinking & Contouring Picture

Compare High-Res

SweetNight CoolNest Ultra Sinking & Contouring Picture

Sinking Depth

5.6 cm (2.2")

4.6 cm (1.8")

Diameter Of Distortion

33.4 cm (13.2")

25.5 cm (10.0")

Responsiveness

9.1

5.6

Responsiveness Video

Response Time

0.5 s

2.3 s

Motion Isolation

9.4

8.9

Motion Isolation Video

Head/Feet Motion Isolation

Preview Graph

SweetNight CoolNest Ultra Head/Feet Motion Isolation

Lumbar Motion Isolation

Preview Graph

SweetNight CoolNest Ultra Lumbar Motion Isolation

Peak Acceleration @ Head/Feet

0.29 g

0.55 g

Dissipation Time @ Head/Feet

0.32 s

0.35 s

Peak Acceleration @ Lumbar

1.27 g

2.35 g

Dissipation Time @ Lumbar

0.25 s

0.27 s

Edge Support

6.6

7.1

Naturalistic Loading Pad Video

Naturalistic Loading Pad

Preview Graph

SweetNight CoolNest Ultra Naturalistic Loading Pad

Small Platen

Preview Graph

Naturalistic Loading Pad Indentation

164 mm

158 mm

Small Platen Indentation @ 0 mm From Edge

202 mm

166 mm

Small Platen Indentation @ 150 mm From Edge

175 mm

143 mm

Increased Indentation @ Mattress Edge

27 mm

23 mm

Cooling

8.1

7.8

Cooling Graph

Preview Graph

Energy Transferred Over 1st Hour

67 kJ

68 kJ

Energy Transferred Over 8 Hours

166 kJ

157 kJ

Components

Cover

Cover Picture

Compare High-Res

Sleeping Surface Material

Polyester

Removable

Yes

Machine Washable

Yes

Edge Construction

Edge Support Picture

Compare High-Res

SweetNight CoolNest Ultra Edge Support Picture

Edge Component

None

Foam Layer Material

Foam Layer Material Picture

Compare High-Res

SweetNight CoolNest Ultra Foam Layer Material Picture

Quilted Top Fill

N/A

Upper Comfort Foam @ Head/Feet

Memory Foam

Upper Comfort Foam @ Lumbar

Memory Foam

Lower Comfort Foam @ Head/Feet

N/A

Memory Foam

Lower Comfort Foam @ Lumbar

N/A

Memory Foam

Transition Foam

Polyfoam

Support Foam

Polyfoam

Foam Layer Mass Density

6.7

6.0

Quilted Top Fill

N/A

Quilted Top Fill Foam Density vs. Reference

N/A

Upper Comfort Foam @ Head/Feet

54 kg/m³ (3.4 lb/cu.ft.)

Upper Comfort Foam @ Head/Feet Density vs. Reference

0.8

Upper Comfort Foam @ Lumbar

54 kg/m³ (3.4 lb/cu.ft.)

Upper Comfort Foam @ Lumbar Density vs. Reference

0.8

Lower Comfort Foam @ Head/Feet

N/A

48 kg/m³ (3.0 lb/cu.ft.)

Lower Comfort Foam @ Head/Feet Density vs. Reference

N/A

0.8

Lower Comfort Foam @ Lumbar

N/A

48 kg/m³ (3.0 lb/cu.ft.)

Lower Comfort Foam @ Lumbar Density vs. Reference

N/A

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

32 kg/m³ (2.0 lb/cu.ft.)

30 kg/m³ (1.9 lb/cu.ft.)

Support Foam Density vs Reference

1.1

1.0

Foam Layer Thickness

Foam Layer Thickness Picture

Compare High-Res

SweetNight CoolNest Ultra Foam Layer Thickness Picture

Quilted Top

N/A

Upper Comfort Foam @ Head/Feet

5.0 cm (2.0")

2.5 cm (1.0")

Upper Comfort Foam @ Lumbar

5.0 cm (2.0")

2.5 cm (1.0")

Lower Comfort Foam @ Head/Feet

N/A

1.0 cm (0.4")

Lower Comfort Foam @ Lumbar

N/A

1.0 cm (0.4")

Transition Foam

5.0 cm (2.0")

6.5 cm (2.6")

Support Foam

19.1 cm (7.5")

28.0 cm (11.0")

Spring Layer Dimensions

Spring Layer Height Picture

Compare High-Res

SweetNight CoolNest Ultra Spring Layer Height Picture

Spring Layer Density Picture

Compare High-Res

SweetNight CoolNest Ultra Spring Layer Density Picture

Comfort Layer Height

N/A

Comfort Layer Coil Density

N/A

Comfort Layer Coil Gauge

N/A

Support Layer Height

N/A

Support Layer Coil Density

N/A

Support Layer Coil Gauge @ Head/Feet

N/A

Support Layer Coil Gauge @ Lumbar

N/A

Foam Layer Firmness

Comfort Layer IPD

Preview Graph

Transition & Support Layer IPD

Preview Graph

Quilted Top Fill 25% IPD

N/A

Upper Comfort Foam @ Head/Feet 25% IPD

1.6 kPa

Upper Comfort Foam @ Lumbar 25% IPD

1.6 kPa

Lower Comfort Foam @ Head/Feet 25% IPD

N/A

Lower Comfort Foam @ Lumbar 25% IPD

N/A

Transition Foam 25% IPD

1.6 kPa

Support Foam 25% IPD

3.2 kPa

Spring Layer Firmness

Comfort Layer Firmness

Support Layer Firmness

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

Upper Comfort Foam @ Head/Feet

11%

Upper Comfort Foam @ Lumbar

11%

Lower Comfort Foam @ Head/Feet

N/A

Lower Comfort Foam @ Lumbar

N/A

Transition Foam

34%

Support Foam

45%

38%

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

Mattress (Plush)

Full

Mattress (Plush)

King

Mattress (Plush)

King

CoolNest Ultra (16")

Queen

Mattress (Plush)

Queen

CoolNest Ultra (16")

Twin

Mattress (Plush)

Twin XL

Mattress (Plush)