|Weight:||Men: 11.8oz | Women: 10.1oz|
|Heel to toe drop:||Men: 10mm | Women: 10mm|
|Arch type:||High arch|
|Strike Pattern:||Heel strike|
|Distance:||Daily running | Long distance | Marathon|
|Heel height:||Men: 31mm | Women: 31mm|
|Forefoot height:||Men: 21mm | Women: 21mm|
|Release date:||Jun 2018|
|Type:||Heavy | Big guy|
|Width:||Men: Narrow, Normal, Wide | Women: Normal, Wide|
|Colorways:||Red, Black, Blue, Grey, Silver|
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89 / 100 based on 4 expert reviews
Is version 2 of the Mizuno Wave Sky as good as the original, or better?More photos
According to Running Warehouse, “The Mizuno Wave Sky  is a highly-cushioned premium neutral running shoe best suited for daily training over any distance.”
Do we agree? See the verdict below.
The Wave Sky 2 from Mizuno weighs 11.4 ounces – a slight increase over the 11.1 ounces of the original Wave Sky, and has a 10mm drop. The weight increase is not felt on the road.
The shoe, in fact, feels lighter than its weight. To prove this, I alternated this shoe with the Wave Rider 21 – which weighs 10.1 ounces – to see if the Wave Sky feels noticeably heavier. It does not.
When it comes to fit, the Wave Sky 2 feels like just a slightly larger, somewhat roomier version of the Wave Rider. It fits well in one’s normal running shoe size.
The sole of the shoe is flared out on both the medial and lateral sides – front and rear. So I’d often look down and wonder, if just for a moment if I had on a pair of trail shoes.
The outsole and midsole remain unchanged from the original shoe. What’s different is the upper. The upper on the first iteration of the Wave Sky appeared to mix both retro and modern visual schemes. I liked it, but some felt that it did not look like a $150 shoe.
The upper on the Wave Sky 2 is most attractive – especially in the Directoire Blue and Cherry colorway, and the shoe now definitely looks modern and worth its price. It also looks like a big brother version of the Wave Rider 22.
The new upper provides plenty of toe room up front; an AeroHug saddle in the midfoot which, yes, hugs the foot; and a nicely padded soft heel collar which keeps one’s ankles locked down.
Although the heel collar is well padded, Mizuno did not go overboard here as it did on the Mizuno Wave Precision 13. (That model had so much firm padding in the rear that it bothered my Achilles tendon.)
The heel counter on the shoe is firm and properly protective.
The tongue on the shoe has enough padding that it stays in place. I was initially concerned about the large round shoe laces which often come untied. However, that’s not a concern with the laces on the Wave Sky 2.
The insole on the shoe is thicker than I’d like, so I replaced it with the svelte insole from the Mizuno Wave Sayonara 3, a workaround that succeeds while having the added bonus of trimming a modicum of weight.
A neutral shoe?
The Wave Sky 2 is technically listed as a neutral training shoe. However, Mizuno’s thermal plastic wave ensures a more than moderate level of stability from just in front of the heel to the mid-forefoot.
If you’ve run in the Mizuno Wave Rider in the last two or three years, you know that each version of the shoe appears to have more of a pillowy feeling, with more bounce-back and forefoot flexibility.
As each version of the Wave Rider is to its predecessor, the same is true when it comes to the Wave Sky 2 and the Wave Sky. Although the midsole and sole of both shoes appear to be identical, the Wave Sky 2 seems to offer a bit more cushion up front - while simultaneously being a tad more flexible, and delivering an increased amount of energy return.
Another way of explaining this is that the first Wave Sky was a very comfortable, cushioned shoe that took some time to break in. Initially, it felt stiff underfoot.
To the contrary, the Wave Sky 2 felt pillowy and cushioned from mile one onward. This can, in fact, be felt while walking in the shoe. And the increased bounce-back was also immediately apparent.
The Wave Sky 2 might have been called the Wave Sky Plus. In the words of a classic rock song, it’s “just a little bit better.”
On the road
The Wave Sky 2 is a very good pace shoe on concrete and asphalt. It will let you maintain a steady pace without much effort.
It also makes for a decent trail shoe on basic surfaces, and there’s enough cushioning that one need not worry about running on hard rock trails. The forefoot cushioning up front will protect sensitive metatarsals on virtually any surface.
The wave plate facilitates both midfoot landings and heel strikes. One can sprint for brief periods of time in this shoe, but it’s doubtful that one would select the Wave Sky 2 to wear on race day. (This is not its intended function.) As this is the case, one might consider using the shoe as part of a two or three shoe rotation.
In the rotation
A Mizuno loyalist might want to consider using the excellent Wave Shadow 2 as a short to a mid-mileage trainer and race day shoe, with the Wave Sky 2 used for longer run days and as a post-race recovery shoe. The Wave Rider 22 might be added to the mix as a shoe that slots between the other two.
If one is ecumenical when it comes to running shoe brands, the New Balance 1400 v6 makes for a great fast-paced trainer and racer. That shoe can be used on days when one is not running long slow distances in the Wave Sky 2.
In my look at the original Wave Sky, I found the shoe to be the equivalent of the excellent Brooks Glycerin 15. And I presciently added, “I expect that it will only get better in the future.” Mizuno has maintained and improved the quality of this attractive, well manufactured, and highly durable trainer.
At $150, the Wave Sky 2 is not a bargain shoe, but it may be viewed as a bargain for the runner who puts in long mileage training days. This shoe is up to the task and will serve that runner for hundreds of comfortable miles.
The Wave Sky 2 should also be considered as a first shoe for the new runner, and as a highly protective shoe for runners with sensitive feet and those battling against Plantar Fasciitis. (I found this to be one of the best shoes to wear during a PF flare-up.)
This expert has been verified by RunRepeat. Reviews are neutral, unbiased and based on extensive testing.
Mizuno Wave Sky 2 – The Ghostbuster!More photos
First things first – this is a GREAT shoe in its category and will be ready for any number of miles right out of the box. The Mizuno Wave Sky 2 is a thick-cushioned shoe with a higher heel-to-toe drop. It is meant to absorb plenty of shock and provide lots of cushion while also having a good grip on any surface.
The main source of competition will likely be from the Brooks Ghost line. Just like the Ghost, this shoe is designed to provide plenty of cushioning and lots of comfort to the runner. It is a neutral shoe which means it should allow the user’s foot to roll naturally.
Big fan of the color blue!
These aren’t the shoes to set a PR with as they are more for comfort than speed. Personally, I think this is the best thick cushioned shoe on the market, and if the Brooks Ghost is still the top shoe in this category, then this shoe is the Ghost-buster.
Reviewing from the ground up…
Tread & outsole
The tread consists of these thick lugs with strips of rubber in each. The lugs are to allow traction even in muddy or gravel areas while the thin rubber on each lug grips well on normal surfaces such as pavement and brick (my main areas of running).
The only time I’ve seen something like this was on my Topo Magnifly 2 shoes, and if you read that review, then you’ll know I love those shoes, they are still my go-to pair.
Just like those, the tread on the Sky 2 never once failed me. Whether I was going uphill, downhill, running on gravel, wet brick, dry or whatever it was, the tread grabbed it every step of the way.
Notice the “lugs” on the outside with the thinner rubber pattern inside — great traction.
The outer sole is a blown rubber which is thick enough to absorb shock but doesn’t provide much in the way of rebound.
I’m fine with it for two reasons: (1) rebound always goes away after so many miles and (2) a rebound might seem nice, but it throws off the normal gait just a little. This is just a personal feeling on rebound and while I welcome the neutral hit and release, others may prefer to have more bounce in their shoe.
I also found the transition from heel to toe to be one of the smoothest ever. This is mostly thanks to the PEBAX Wave Plate technology, which was also used in their Wave Shadow series.
This is a plate they place inside the outsole which goes above the heel area and comes out right around midsole. The purpose is to absorb more of the shock while allowing the foot to move naturally in its forward direction.
The orange is the plate. You can see where it is beneath the heel and comes out in the midsole of the outer (the tread area).
Just like the Shadow series, the U4ic (pronounced “Euphoric”) and U4icX were used to create a midsole that can handle shock from the foot strike while still providing a cushioned feel.
Because of how thick these shoes are (11mm drop) I felt that there was plenty of cushioning no matter how hard I might land. I even put these to the test with some hill work, and when coming down a bit too much on my heels the midsole and outsole combined to provide plenty of cushion with a good grip.
The blue midsole fits into the white outsole in a zigzag pattern. Quite comfortable!
Mizuno also used their Aerohug technology which is supposed to provide a great fit for the foot. I have no idea exactly how it works, but what I felt was a shoe that hugged my foot snugly while somehow never feeling tight. Even after 15 miles, my legs felt good, and my feet felt un-restricted.
I mention this because on longer runs, the feet can swell a bit and it will make the wearer need to stop and redo the laces to provide a more comfortable feel. This is not the case for me with the Sky 2, because I am not building up for any particular race, a 15 miler would normally start to make my legs feel some pain. So no pain and no need to readjust the laces was very welcomed.
Upper & toe box
The toe box was neither too larger nor too narrow. Other shoemakers such as Brooks tend to make their toe boxes bigger especially in height, while some might make theirs a little smaller.
Mizuno, in my opinion, hit the center of the road quite well. I may have narrow feet, but I did not have to tighten the laces over to get my foot to stay in place, yet there was enough room to allow some toe splaying, which is always nice and more natural.
Not an overly large toe box but still a fair amount of room.
Using my patent pending “place my hands inside the shoes and swing my arms like a windmill” test, I noticed that these shoes did not breathe overly well. Which is a way of saying I didn’t feel the wind on my hands while swinging them around goofily. Much to my surprise, my feet never once felt hot.
This is probably because the new sockliner not only provides a good fit, but it also pulls the moisture from the sock area while allowing air into the shoe. After some longer runs, I even noticed how damp the thick tongue and heel area felt despite my feet feeling nice and dry. A good sign that this sockliner/upper setup works.
The tongue is a thicker one, as I mentioned, but it stayed in place nicely without causing any extra rubbing or annoyance. Also, the laces worked quite well and did not need to be readjusted due to coming loose after “X” amount of miles.
Overall, the entire upper design created a smooth and comfortable feel around the foot for any length of run.
My favorite part of this shoe: the heel. It did everything I want a heel of a shoe to do. It wrapped my heel nicely, provided good support, and most importantly it did not rub the back of heels raw any anytime.
As much as I love Brooks shoes, this is where they failed me. The heel of the Ghost would constantly slip on me and also cause rubbing, something most thick cushioned running shoes seem to do. I am unsure exactly how Mizuno got around this homogenous issue, but it is GREATLY appreciated!
Outer layer breathes while the inner wicks moisture. Also, notice the Aerohug label.
The Mizuno Wave Sky 2 is hands down my favorite pair of shoes in the thick cushion category. While others struggle with issues such as heel rubbing, an upper area that either feels too tight or too loose or even a sockliner that rubs and creates blisters, the Sky 2 feels great on foot right out of the box.
If you want a shoe with more cushion then just wave goodbye to the other brands, get this one, and make the Sky the limit! You thought I wouldn’t use those puns at least once? Well, I did and in the same sentence… you’re welcome!
This expert has been verified by RunRepeat. Reviews are neutral, unbiased and based on extensive testing.
- The Mizuno Wave Sky 2 is a road running shoe that is best for runners who have neutral foot motion. One of the significant updates of this Mizuno shoe is the Aero Hug. It is designed to quickly adapts to the foot's motion, providing the runner a more comfortable running experience/
- Another update is the use of the Dual Zone engineered mesh. Mizuno uses this new material with the aim to offer a flawless and distraction-free fit.
Mizuno made the shoe available in medium widths for both the women's and men’s version. In the upper area, the presence of the Aero Hug technology improves the overall fit of the footwear. It is sure to offer a more comfortable fit for those who are medium-footed. The Mizuno Wave Sky 2 is available in standard running shoe length when it comes to the size.
In the forefoot and heel section lies the X10. This material is made up of a durable carbon rubber that aims to deliver enhanced traction. The right amount of grip provided by the outsole is essential in handling different paved surfaces. This outsole material is also present in the Inspire 15 running shoe.
A lighter version of the U4ic is utilized in the midsole of the Mizuno Wave Sky 2. This full-length material is called the U4icX. With this component of the shoe, it aims to deliver increased responsiveness. A softer and more comfortable underfoot feel is also offered because by this midsole unit.
The midsole area of the Mizuno Wave Sky 2 uses the Cloudwave. This technology is described to be a redesigned elastic and thermal plastic wave that runs from the heel to the midfoot area. As a result, it creates an incredibly springy and well-cushioned ride.
A gender-specific network of grooves called the Smooth Ride is integrated into the shoe. It creates a smoother heel-to-toe transition that the runner would enjoy. This technology is significant in minimizing the fast acceleration and deceleration of the foot.
The Mizuno Wave Sky 2 utilizes the Aero Hug. It is defined as an innovative fit system that plays a vital role in the performance of the shoe. The primary purpose of the Aero Hug is to adapt to the foot motion and movement. As a result, a comfortable fit is achieved without compromising breathability and support.
Mizuno added the Anatomical sock liner. With the focus of adding a layer of cushioning underneath the foot, the runner is sure to experience a hassle-free and pleasant ride.
For a better response to the foot's movements, the Dual Zone engineered mesh is used in making the footwear. The mesh in the forefoot area is updated to promote a distraction-free fit.
The u4icX Strobel Lining is stitched from the upper unit to the full-length fabric. The goal of which is to provide a more agreeable underfoot feel.