Products
Tested using Methodology v0.16
Updated Oct 16, 2026 02:50 PM
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Mizuno
Tested using Methodology v0.16
Updated Oct 16, 2026 02:39 PM
SEE PRICE
Amazon
Heel Stack Height
45.3 mm
Weight
299.0 g (10.55 oz)
Heel-To-Toe Drop
5.2 mm
Plate
None
Heel Stack Height
46.6 mm
Weight
279.7 g (9.87 oz)
Heel-To-Toe Drop
10.4 mm
Plate
None
Our Verdict
Mizuno Sky Prime
ASICS GEL-SLOWCUSH
The Mizuno Sky Prime is a better long-run shoe than the ASICS GEL-SLOWCUSH. Both cost the same and provide amazing cushioning and hold up similarly well as the miles build, but the Mizuno is a smoother, more efficient shoe that gives you more assistance over extended efforts. It's also slightly more stable. That said, the ASICS is lighter, so it's the better option if you want maximum cushioning with less bulk.
Variants
- Sky Prime (Vulcan/Mirage Grey - (Men - US 9))
- Sky Prime (White/Lime Pulp - (Women - US 7))
- GEL-SLOWCUSH (Soft Oat/Simply Taupe - (Men - US 9))
- GEL-SLOWCUSH (Soft Oat/Simply Taupe - (Women - US 7))
Main Differences for
Half/Full Marathon Racing
Half/Full Marathon Racing
Threshold
Half/Full Marathon Racing
7.0
6.8
Forefoot Compression Energy Return
6.5
3.5
Weight
4.4
5.2
Full Comparison
Design
Weight
4.4
5.2
Right Shoe Weight Photo
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Left Shoe Weight Photo
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Weight
299.0 g (10.55 oz)
279.7 g (9.87 oz)
Stack Heights
Stack Height Photo
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Heel Stack Height
45.3 mm
46.6 mm
Forefoot Stack Height
40.1 mm
36.2 mm
Heel-To-Toe Drop
5.2 mm
10.4 mm
Advertised Heel-To-Toe Drop
6.0 mm
8.0 mm
External Shape
3D Model Full Shoe
Preview 3D
Preview 3D
Outsole Heel Width
95 mm (3.7")
100 mm (3.9")
Outsole Arch Width
85 mm (3.3")
89 mm (3.5")
Outsole Forefoot Width
125 mm (4.9")
118 mm (4.6")
Heel Width-To-Stack Ratio
2.10
2.15
Forefoot Width-To-Stack Ratio
3.12
3.26
Internal Shape
3D Model Internal
Preview 3D
Preview 3D
Internal Length
279 mm (11.0")
283 mm (11.1")
Internal Heel Width
65 mm (2.6")
67 mm (2.6")
Internal Forefoot Width
90 mm (3.5")
96 mm (3.8")
Wide Sizing Available
No
No
Forefoot Fit: Width
8.6
9.5
Forefoot Width Photo
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Ball-Of-Foot TTS Deviation
2.0 mm (0.080")
2.7 mm (0.107")
Toe TTS Deviation
-4.3 mm (-0.168")
-0.1 mm (-0.004")
Forefoot Fit: Height
5.5
5.5
Forefoot Height Photo
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Toe TTS Deviation
-5.3 mm (-0.208")
-5.3 mm (-0.209")
Arch Fit: Width
8.5
8.5
Arch Fit Photo
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Arch Width TTS Deviation
-2.6 mm (-0.104")
-2.7 mm (-0.105")
Length Fit
10
10
Toe Clearance Photo
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Heel Rocker Geometry
7.4
7.9
Heel Rocker Photo
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Heel Spring
24 mm (0.9")
25 mm (1.0")
Heel Apex Position
24.8%
20.1%
Heel Rocker Angle
17.7°
22.6°
Forefoot Rocker Geometry
8.1
7.8
Forefoot Rocker Photo
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Toe Spring
60 mm (2.4")
56 mm (2.2")
Toe Apex Position
67.0%
66.6%
Forefoot Rocker Angle
31.0°
29.2°
Foam
Primary Foam Picture
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Secondary Foam Picture
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Primary Foam Name
Enerzy NXT+
FF LUXE+
Primary Foam Type
PEBA
Unknown
Secondary Foam Name
Enerzy NXT
No Secondary Foam
Secondary Foam Type
EVA
No Secondary Foam
Laces
Laces Picture
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Lace Type
Flat
Flat
Width
6.0 mm (0.2")
6.0 mm (0.2")
Thickness
1.8 mm (0.1")
1.7 mm (0.1")
Stretch
10.0%
9.5%
Breathability
6.0
6.0
Breathability Video
Upper Breathability
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Upper Microscope Photo
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Time-To-Dry
2.2
2.2
Time-To-Dry Timelapse
Time-To-Dry Graph
Preview Graph
Preview Graph
Time To 30% Dry
14.2 hrs
13.1 hrs
Time To 70% Dry
31.8 hrs
31.8 hrs
Time To Dry
45.5 hrs
49.3 hrs
Water Absorption
6.3
5.1
Dry Weight Photo
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Wet Weight Photo
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Water Absorbed
49.5%
56.5%
Other Features
Other Features Photo
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Tongue Gusset Type
Fully-gusseted
Fully-gusseted
Plate
None
None
Performance
Heel Compression Energy Return
4.3
2.2
Heel Compression Video
Heel Energy Return
Preview Graph
Preview Graph
Heel Energy Return
71.0%
68.3%
Forefoot Compression Energy Return
6.5
3.5
Forefoot Compression Video
Forefoot Energy Return
Preview Graph
Preview Graph
Forefoot Energy Return
74.5%
70.1%
Heel Cushioning
8.6
8.7
Heel Cushioning Picture
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Heel Cushioning
Preview Graph
Preview Graph
Energy Absorbed At 550N
3.71 J
4.13 J
Energy Absorbed At 1100N
10.64 J
10.73 J
Energy Absorbed At 1900N
18.87 J
17.87 J
Forefoot Cushioning
9.2
9.1
Forefoot Cushioning Picture
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Forefoot Cushioning
Preview Graph
Preview Graph
Energy Absorbed At 800N
6.03 J
6.07 J
Energy Absorbed At 1300N
10.47 J
10.38 J
Energy Absorbed At 2050N
15.53 J
15.13 J
Heel Firmness
7.4
6.4
Heel Firmness Graph
Preview Graph
Preview Graph
Firmness At 550N
43.8 N/mm
37.8 N/mm
Firmness At 1100N
51.7 N/mm
47.9 N/mm
Firmness At 1900N
70.4 N/mm
68.1 N/mm
Forefoot Firmness
5.5
5.6
Forefoot Firmness Graph
Preview Graph
Preview Graph
Firmness At 800N
48.2 N/mm
48.3 N/mm
Firmness At 1300N
62.1 N/mm
62.5 N/mm
Firmness At 2050N
85 N/mm
86 N/mm
Forefoot Long Run Cushioning
8.6
8.6
Forefoot Long Run Cushioning
Preview Graph
Preview Graph
Energy Absorbed At 10km
9.77 J
9.76 J
Energy Absorbed At 20km
9.53 J
9.51 J
Energy Absorbed At 30km
9.39 J
9.37 J
Energy Absorbed At 40km
9.29 J
9.27 J
Rocker Stiffness
7.4
5.8
Forefoot Rocker Stiffness Video
Forefoot Rocker Stiffness Graph
Preview Graph
Preview Graph
Force To Flatten The Rocker
97 N
57 N
Forefoot Bending Energy Return
6.4
5.5
Forefoot Bending Video
Forefoot Bending Energy Return
Preview Graph
Preview Graph
Forefoot Bending Energy Return
61.9%
58.5%
Forefoot Bending Stiffness
7.2
7.0
Forefoot Bending Resistance Picture
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Forefoot Bending Resistance
Preview Graph
Preview Graph
Forefoot Bending Stiffness
16.2 N/mm
14.9 N/mm
Forefoot Bending Force
248 N
244 N
Heel Compression Depth
6.2
6.8
Heel Compression Graph
Preview Graph
Preview Graph
Heel Compression At 550N
12.5 mm
14.5 mm
Heel Compression At 1100N
21.3 mm
22.9 mm
Heel Compression At 1900N
27.0 mm
27.9 mm
Forefoot Compression Depth
7.1
7.1
Forefoot Compression Graph
Preview Graph
Preview Graph
Forefoot Compression At 800N
16.6 mm
16.6 mm
Forefoot Compression At 1300N
20.9 mm
20.8 mm
Forefoot Compression At 2050N
24.1 mm
23.7 mm
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Mizuno Sky Prime
ASICS GEL-SLOWCUSH
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Mizuno Sky Prime vs ASICS GEL-SLOWCUSH: Main Discussion
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