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Mizuno Wave Sky Review
November 28, 2017The Good
- Durable
- Insole softens ride
- Offers mild stability
The Bad
- Needs to be broken in over time
- Upper heavy in overlays
- Heavy
Comfort
Out of the box the Mizuno Wave Sky is rigid, making the first few outings a bit rough. Over time, the shoe starts to loosen up and hits a sweet spot. Once on, there was a noticeable hint of softness from the insole and Anatomical Sockliner, which helped soften the ride from the firm midsole. Mizuno used three panels throughout the upper called Dynamotion Fit to help create a sock-like secure fit in the midfoot, however, testers found this to be overkill, saying the overlays felt uncomfortable and heavy. The entry point along the ankle is heavily padded, creating a soft collar.
Fit
All of our testers felt the Wave Sky was true to length with extra room in the toe box but ran on the narrow side through the midfoot. Heavy overlays attached to the lacing system extending down towards the bottom of the foot add a snug, secure fit but further give the shoe a narrow fit. A firm heel cup and well-padded ankle collar do an excellent job of comfortably locking down the heel.
Responsiveness
Noticeable grooves and geometric design throughout the midsole allow the Wave Sky to adapt and roll seamlessly forward as the foot moves through the gait. The firm, full-length U4icX midsole coupled with Cloudwave — a redesigned elastic, thermal plastic wave running from the heel to the midfoot — gave the shoe a firmer ride that didn’t steal from the runner’s stride. Overall, our testers were pleasantly surprised with how responsive the Wave Sky was given its high weight and thick upper.
Speed
It’s best to save the Wave Sky for runs when speed isn’t a priority. Testers did note, if needed they could handle faster running, but its weight and heel dominant profile made sustaining a faster pace was difficult.
Ride Quality
A soft insole does soften the ride a tad, but the firm midsole still dominates the ride. Heel strikers will get the most from this shoe due to Mizuno’s Cloudwave, which is a plate of thermal plastic under the arch that extends from the heel through the midfoot. This elastic plastic plate allows the midsole to collapse while absorbing the hard impact from heel strikes without grounding out.
Cory is a Santa Barbara, CA based athlete, online running coach and freelance journalist specializing in running and climbing related content and gear review.
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