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Mizuno Wave Sky 9

In production · road · Recovery / Long run · $175

Mizuno's plush max-cushion cruiser.

Built for recovery, long run, at a target pace of 8:30–12:00 /mi on road.

The spec sheet

Weight
295 g / 10.4 oz
Heel stack
44 mm
Drop
6 mm
Midsole foam
Enerzy NXT
Plate
—
Cushioning
5 / 5
Energy return
4 / 5
Responsiveness
3 / 5
Rocker
3 / 5
Flexibility
2 / 5
Stability
3 / 5 (5 = most guidance)
Toe-box
Standard
Sizing
True to size
Durability
~450 mi
Price
$175

How it rides

The foam

The midsole is Enerzy NXT, tuned very soft (5/5 on our cushioning scale). Energy return is above average: the midsole rebounds well without feeling unstable. At 44 mm of heel stack this sits in max-cushion territory; legs stay fresher on long efforts, but the platform is tall. Combined, the ride reads as lively at 3/5 responsiveness.

The plate

There is no plate here. The midsole does all the work, so the shoe flexes naturally and stays versatile across paces — easier on the feet day to day, but without the snap of a plated shoe when you want to roll.

The geometry

A 6 mm drop is the mainstream middle — familiar to almost anyone coming from a standard trainer. The rocker is moderate — enough curve to smooth the roll-through without dictating your footstrike. The forefoot is stiff, so it rolls rather than bends — a lever, not a slipper. Support is light — neutral, with a mildly steady platform.

Fit, sizing & life

The toe-box is standard width — comfortable for most feet without swimming. It fits true to size. Expect roughly 450 miles from the outsole, about $0.39 per mile at $175.

For the foams and plates Mizuno uses across its line, read the Mizuno brand guide.

How it compares

Measured against the 542 currently-available shoes in the catalog. The bar shows where this shoe sits in that range.

Weight

295 g / 10.4 oz

20 g heavier than the catalog median of 275 g

Heel stack

44 mm

8 mm taller than the catalog median of 36 mm

Drop

6 mm

Level with the catalog median of 6 mm

Price

$175

15 pricier than the catalog median of 160

Responsiveness

3 / 5

Catalog median 3 / 5

Cushioning

5 / 5

Catalog median 4 / 5

Energy return

4 / 5

Catalog median 3 / 5

Durability

~450 mi

Catalog median ~400 mi

Within the Mizuno line it is heavier than the brand's median (266 g / 9.4 oz) and sits taller than its median stack (40 mm).

Closest alternatives

Current shoes with the nearest combination of weight, stack, drop, foam feel and plate.

Saucony Triumph 24

280 g / 9.9 oz · 42 mm · 6 mm drop · — · $170

PWRRUN PB plush max cushion with surprising liveliness.

Asics Gel-Nimbus 28(2026)

283 g / 10.0 oz · 44 mm · 8 mm drop · — · $180

Deep, plush max cushion for slow miles and heavier runners.

On Cloudeclipse 2

290 g / 10.2 oz · 42 mm · 6 mm drop · — · $190

Double-layer CloudTec for On's softest long-run ride.

New Balance Fresh Foam 1080 v14(2024)

298 g / 10.5 oz · 38 mm · 6 mm drop · — · $165

Plush, wide-fitting flagship cushion shoe with a smooth rockered heel.

Brooks Glycerin Max 2

311 g / 11.0 oz · 45 mm · 6 mm drop · — · $200

Brooks' tallest, softest ride with a strong rocker to keep it moving.

Lineage & siblings