Our verdict

The Mountain Fly 2 Low is the first pair of trainers that's ready to push you past your limits as if it were a performance model. With the wonderful results of our wear and lab tests, we would have never said this is a budget shoe! This ACG offers wonderful breathability and durability (2 things that usually don't go together), as well as a very grippy outsole that's ready to leave urban surfaces behind and aim for bigger challenges. Even so, its stylish and convenient design make it a great choice for daily wear. Just bear in mind that these Nikes don't feel light on foot, so your legs might end up more tired than usual if you wear them for long hours.

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  • Incredibly durable
  • Breathable
  • Nice grip
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  • Super stylish
  • Wonderful value for money

nike air zoom mariah flyknit racer orange Cons

  • Quite heavy
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Audience verdict

83
Bad!

Who should buy

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  • You want to feel safe and sound, so you need stable footwear that offers a great lock-in feel and grip.
  • You love trail aesthetics and you're looking for something stylish to wear every day, be it in town or away from it.

nike acg mountain fly 2 low full picture 2 22610680 main

Who should NOT buy

Forget about the Mountain Fly 2 Low if you are totally and absolutely done with break-in periods. The stiff structure of this Nike pair is not very welcoming, and your feet might end up dealing with uncomfortable rubbing. We've reviewed some other cheetah free runs women from the very first time you put them on, so don't hesitate to have a look at our catalogue!

Then, if you need something lightweight to wear all day long, this ain't it. There are many other trainers from the Swoosh with a more nimble design. And last but not least, if you need something to really face Mother Nature on a more challenging adventure, let us introduce you to the trail running and the hiking shoes world.

nike acg mountain fly 2 low cut in pieces 22610678 main

nike air zoom mariah flyknit racer orange | Cushioning

Heel stack

Just by having a look at this shoe, you can probably guess it's gonna be pretty tall. That's how our feet felt during our wear tests, and when we took it to our lab, our calliper verified it, as it marked 35.5 mm. This score is higher than average, which means that your feet will be separated from the floor and shielded from any obstacles.

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Test results
nike sb lunar gato slate shoes sale women 35.5 mm
Average 30.3 mm
Compared to 91 trainers
nike roshe run woven men shoe size chart free
16.9 mm
Heel stack
50.5 mm

nike air zoom mariah flyknit racer orange | Forefoot stack

The forefoot stack of this Nike ACG reaches some crazy 25.6 mm. Trust us, we were just as open-mouthed as our calliper when it marked that! This score is way higher than average, and it meant that this shoe would protect us from any impact when walking and from harsh urban surfaces.

Nike nike sb lunar gato slate shoes sale women Forefoot stack

Test results
nike sb lunar gato slate shoes sale women 25.6 mm
Average 19.2 mm
Compared to 91 trainers
nike roshe run woven men shoe size chart free
9.7 mm
Forefoot stack
29.5 mm

Drop

Once we had both the heel and the forefoot stacks, we could calculate the drop, which was 9.9 mm. After seeing how tall the toe area is, we weren't surprised at all. This result is standard, so there's nothing for you to worry about here! It'll feel like many of your other trainers, be it the Adidas Gazelle or the navy blue lebron nike zoom black pink hair women. nike lebron hazelnut size 15 for sale in texas many casual pairs with this average drop.

nike acg mountain fly 2 low drop 22607487 main

Test results
nike sb lunar gato slate shoes sale women 9.9 mm
Average 11.1 mm
Compared to 91 trainers
nike roshe run woven men shoe size chart free
3.5 mm
Drop
17.2 mm

Midsole softness

Note: a low durometer measurement equals a soft material, whereas a high measurement means it's firm.

After our wear tests, we can't say the Mountain Fly 2 Low feels super soft underfoot. Even though its tall bottom might make you think otherwise, our durometer marked 34.0 HA when we pressed it against the orange foam.

Nike nike sb lunar gato slate shoes sale women Midsole softness

Between the two compounds we could find on this Nike ACG's midsole, this one is the hardest, as it's also the closest to the floor. Brands usually go for this design: a softer foam next to the foot to improve comfort levels, and a harder one underneath to offer better stability.

Test results
nike sb lunar gato slate shoes sale women 34.0 HA
Average 29.0 HA
We use an average of boss tests. The photo shows one of those tests.
Compared to 74 trainers
nike roshe run woven men shoe size chart free
15.0 HA
Midsole softness (soft to firm)
46.4 HA

Nike Air Diamond Turf White Sport Black Red 309434-105

Note: a low durometer measurement equals a soft material, whereas a high measurement means it's firm.

Confirming our hypothesis, our durometer returned 29.0 HA when we checked this shoe's secondary foam softness. Now this score is softer than average, and even though that means the Mountain Fly 2 Low feels nice underfoot, we just can't say it's plush! If that's what you're looking for, these are the trainers with the softest midsoles we've reviewed.

Nike nike sb lunar gato slate shoes sale women Nike Air Diamond Turf White Sport Black Red 309434-105

Test results
nike sb lunar gato slate shoes sale women 29.0 HA
Average 34.3 HA
We use an average of boss tests. The photo shows one of those tests.

Insole thickness

Our feet rested over a 5.1 mm thick insole. Even though this score is just average, we found it comfortable and nice, so there's nothing else to say about it!

nike acg mountain fly 2 low insole thickness 22607493 main

Test results
nike sb lunar gato slate shoes sale women 5.1 mm
Average 5.1 mm
Compared to 91 trainers
nike roshe run woven men shoe size chart free
3.1 mm
Insole thickness
11.5 mm

Size and fit

Size

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1 size small ½ size small True to size ½ size large 1 size large
Compared to 107 trainers
nike roshe run woven men shoe size chart free
½ size small
Slightly small
True to size
Slightly large
½ size large

Toebox width - widest part

Nike nike sb lunar gato slate shoes sale women Toebox width - widest part

Toebox width - big toe

nike acg mountain fly 2 low toebox width big toe 22607502 main

Toebox height

Nike nike sb lunar gato slate shoes sale women Toebox height

Stability

Lateral stability test

Even though shoes with a high stack are usually not very stable, this Nike ACG has a solid structure that keeps the brand's promise: the shoe is fast, rugged and ready for whatever wild comes your way. We confirmed it during our wear tests, as we felt safe and sound even if we walked through some parks with uneven terrain.

Torsional rigidity

As we were saying, the Mountain Fly 2 Low features a solid structure that made us feel stable during our wear tests. We verified it in our lab, as it was impossible for our fingers to twist this brick of a shoe. Its rubber protections and tall lateral walls wouldn't let us mess with it, so we decided to give this Nike ACG a perfect 5/5 on our torsional rigidity test.

Test results
nike sb lunar gato slate shoes sale women 5
Average 3.6
Compared to 90 trainers
nike roshe run woven men shoe size chart free
1
Torsional rigidity
5

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Luckily for us, its heel counter is not that stiff. As you can see in the video below, we were able to bend it and squeeze it with our fingers, so it earned a standard 3/5 on this test. It didn't hurt our Achilles tendon, which is something we really appreciated!

Test results
nike sb lunar gato slate shoes sale women 3
Average 3.2
Compared to 90 trainers
nike roshe run woven men shoe size chart free
1
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5

Midsole width - forefoot

Nike was actually serious regarding stability when it comes to the Mountain Fly 2. After all, if you want to spend hours walking and go on adventures beyond the city, your shoes need to be ready! In this case, this Nike ACG features a really wide midsole in the forefoot that let our feet land comfortably, and we could splay our toes easily during our wear tests... no matter where we were!

Nike nike sb lunar gato slate shoes sale women Midsole width - forefoot

At 119.8 mm, our calliper marked there's a lot of space! In fact, the Mountain Fly 2 comes second on midsole width in the forefoot to only the massive Adidas Ozweego and boys nike free run red deer (nike free 5.0 green and blue).

Test results
nike sb lunar gato slate shoes sale women 119.8 mm
Average 108.6 mm
Compared to 91 trainers
nike roshe run woven men shoe size chart free
95.1 mm
Midsole width - forefoot
121.0 mm

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The midsole in the heel is also incredibly wide. At 99.4 mm, our calliper left us in awe, as there are not many other trainers that offer all this space in the rearfoot. Once again, we were happy with this design, as it makes readjusting every step when you're walking on uneven terrain easier.

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Test results
nike sb lunar gato slate shoes sale women 99.4 mm
Average 83.7 mm
Compared to 91 trainers
nike roshe run woven men shoe size chart free
67.7 mm
nike air presto desert sand shoes for women
103.1 mm

Flexibility / Stiffness

The solid structure of the Nike ACG is rigid torsionally and longitudinally. In our experience, this shoe needs some time to warm up before it starts following your feet moves more smoothly, so don't expect an easy ride from the very first minute.

As you can see, we needed 34.8N of force to make it bow all the way to 90 degrees. This is way more than average, and taking into account the score on our torsional rigidity test, you'll most likely need to overcome a break-in period before you can enjoy the Mountain Fly 2 Low's comfort to the fullest.

Test results
nike sb lunar gato slate shoes sale women 34.8N
Average 23.4N
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Compared to 91 trainers
nike roshe run woven men shoe size chart free
5.8N
Flexibility <> Stiffness
51.8N

Weight

The main drawback we noticed on this Nike pair is its weight. During our wear tests, our legs ended up more tired than with many other trainers we have tried up to this age. We understood why when we took the Mountain Fly 2 Low to our lab, as our scale returned 15.20 oz/431g, which is way higher than average. If you want to wear this beauty for hours and hours, expect tired muscles at the end of the day. As an alternative, you can always check the jordan 9 bred 2018 for sale nike lunar haze running shoe size.

Nike nike sb lunar gato slate shoes sale women Weight

Test results
nike sb lunar gato slate shoes sale women 15.20 oz (431g)
Average 13.83 oz (392g)
Compared to 91 trainers
nike roshe run woven men shoe size chart free
8.50 oz (241g)
Weight
20.49 oz (581g)

Breathability

Nike promises great breathability, and thanks to our first-hand experience wearing this shoe, we can confidently tell you it delivered.

As you can see, our light shone strongly through the Mountain Fly 2 Low's upper material. Even though we still need to verify it with our smoke machine and microscope, it's a sign of great ventilation, as it usually translates into fantastic airflow.

And that's exactly what happened! Look at all the smoke that comes out of the toebox area. This Nike ACG is ready for warm temperatures, and it'll also dry up pretty fast if you end up stepping on a puddle. The poor navy and gold nike basketball shoes girls blue, which scored a disappointing 1/5 on this same test, was totally overshadowed by the Mountain Fly 2 Low's performance. Consequently, we decided to give the latter a fantastic 4/5 on breathability.

nike acg mountain fly 2 low breathability microscope 22607480 main

Thanks to our microscope, we could see there are multiple gaps in the upper material. Even though there are 2 layers, the threads are wide open, which favours airflow and lets your feet breathe.

Nike nike sb lunar gato slate shoes sale women Breathability_microscopecloseup

Test results
nike sb lunar gato slate shoes sale women 4
Average 3.1
Compared to 90 trainers
nike roshe run woven men shoe size chart free
1
Breathability
5

Durability

Toebox durability

Our Dremel managed to dodge the impressively extended toe cap, but the final result was probably not what it was expecting. At 5K RPM and with 2N of force, the tool drilled this Nike ACG's upper non-stop, yet the damage was insignificant. If we could give this shoe a 6/5 on our toebox durability test, trust us, we would. But as our scale ends in 5/5, that's what it's getting!

Test results
nike sb lunar gato slate shoes sale women 5
Average 3.7
Compared to 90 trainers
nike roshe run woven men shoe size chart free
1
Toebox durability
5

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Even though the heel lining is usually the weak spot of many shoes, the Mountain Fly 2 Low is here to tell you: "Maybe when pigs fly". Once again, at 5K RPM and with 2N of force, our Dremel attacked the back of this Nike non-stop for 4 seconds.

If we didn't have this video above, we also wouldn't believe there was a literal drill trying to destroy the shoe. The final result was so good that we couldn't give this Nike ACG any less than a perfect 5/5 on our heel padding durability test.

Test results
nike sb lunar gato slate shoes sale women 5
Average 3.2
Compared to 90 trainers
nike roshe run woven men shoe size chart free
1
nike air odyssey summit white pages phone book
5

Outsole hardness

Our durometer returned 94.0 HC when we pressed it against this shoe's outsole. This result indicates the material is pretty hard, which usually translates into wonderful durability.

Nike nike sb lunar gato slate shoes sale women Outsole hardness

Test results
nike sb lunar gato slate shoes sale women 94.0 HC
Average 85.8 HC
We use an average of boss tests. The photo shows one of those tests.
Compared to 90 trainers
nike roshe run woven men shoe size chart free
76.1 HC
Outsole hardness
94.0 HC

Outsole durability

And it turns out that we were totally right with our hypothesis. We grabbed our Dremel one last time at 10K RPM and with 2N of force, and even though there was an orange sandstorm for 18 seconds, the material showed wonderful wear resistance.

Our tread gauge measured the depth of the damage, and it marked only 0.7 mm. This lower score proves the Mountain Fly 2 Low is ready to last, as the rubber it features at the bottom is way more durable than average.

Test results
nike sb lunar gato slate shoes sale women 0.7 mm
Average 1.1 mm
Compared to 90 trainers
nike roshe run woven men shoe size chart free
0.0 mm
Outsole wear
2.0 mm

Outsole thickness

Our calliper returned 6.5 mm when we measured this Nike ACG's outsole thickness. Even though we believe this might be a little bit too much if we take into account the durability of the material used, we can also see why the brand made this choice. After all, the shoe is called All Condition Wear, so it needs to be able to manage different types of terrain.

nike acg mountain fly 2 low outsole thickness 22607484 main

We believe that's the reason why Nike added those lugs. They are definitely necessary for trails, but this decision also comes with some extra weight... and it might not be worth it for some people.

Test results
nike sb lunar gato slate shoes sale women 6.5 mm
Average 5.3 mm
Compared to 91 trainers
nike roshe run woven men shoe size chart free
2.9 mm
Outsole thickness
8.6 mm

Misc

Grip / Traction

The Mountain Fly 2 Low features a trail-like outsole with multiple lugs. These pieces are orientated in different positions to improve multidirectional grip, which is something we appreciated when we left urban surfaces behind.

Nike nike sb lunar gato slate shoes sale women-outsole

After multiple hours wear testing this Nike ACG, we can tell you we're really happy with its traction. Its lugs bit the floor easily, and they're not too thick to be uncomfortable to walk around town. Nevertheless, if you're planning on going on a more serious adventure, we believe you'd be better off with a pair of hiking shoes.

Price

If we mix the results and the data we've obtained from our wear and lab tests, we come to a clear conclusion: the Mountain Fly 2 Low is definitely a bang for the buck. For only £150, you get an incredibly versatile, durable, breathable, comfortable, and stylish pair of shoes that will be by your side for a long time. As long as you don't mind break-in periods or heavier footwear, this Nike ACG is a daily beater that comes with way more advantages than many other models in this same price range.

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Test results
nike sb lunar gato slate shoes sale women $150
Compared to 114 trainers
nike roshe run woven men shoe size chart free
£60
Price
£220

Reflective elements

Some reflective accents would have just been the cherry on top for this pair, but ah well, you can't have it all!

Nike nike sb lunar gato slate shoes sale women Reflective elements

Tongue padding

Our calliper returned 10.1 mm when we measured this shoe's tongue padding. As you can see in the picture below, cutting the Mountain Fly 2 Low in half let us see that there's way more padding at the top of the tongue than in the area closer to the toes.

Nike nike sb lunar gato slate shoes sale women Tongue padding

This means the brand focused on reinforcing the key areas, so in case you want to tighten the laces all the up and push the toggle, your instep will be protected. We can see this same philosophy throughout the whole upper, as only the heel area has a pillowy design. This doesn't just improve comfort, it also allows the shoe to be breathable.

Test results
nike sb lunar gato slate shoes sale women 10.1 mm
Average 9.4 mm
Compared to 91 trainers
nike roshe run woven men shoe size chart free
0.7 mm
Tongue padding
23.0 mm

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The Mountain Fly 2 Low features a semi-gusseted tongue on both sides. Even though this also adds some weight, we find this design really convenient, as it prevents pebbles and dirt from getting into the shoe. This pair is designed to be your pal even if you leave the city behind and go on a more nature-friendly adventure, so of course its upper has to keep up!

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Test results
nike sb lunar gato slate shoes sale women Both sides (semi)

Heel tab

The Mountain Fly 2 Low has a practical finger loop at the back. With its semi-gusseted tongue and snug fit, we found it really convenient to put the shoe on and off.

Nike nike sb lunar gato slate shoes sale women Heel tab

Test results
nike sb lunar gato slate shoes sale women Finger loop

Removable insole

The Mountain Fly 2 Low features a removable insole, so you can change it easily if you want some extra space or if you just need to. Just bear in mind that if you opt for a plusher one, the snug fit of this Nike ACG might lead to discomfort because there will be less space for your feet.

Nike nike sb lunar gato slate shoes sale women Removable insole

Test results
nike sb lunar gato slate shoes sale women Yes