Reebok Nano X Unknown Shoe Review

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The Reebok Nano X Unknown is here.

This is a lighter-weight, mid-cut version of Reebok’s CrossFit training shoe – the Nano X.

Reebok Nano X Unknown Shoe Review - Front Quarter 2
Introducing the Reebok Nano X Unknown. It’s a mid-cut training shoe – and the newest version of Reebok’s Nano X.

Out review pair is here – and we like it! Let’s take a look at this shoe.

Reebok says this is a mid-cut shoe for training.

Here’s some of the styles we are going to look at:

Reebok Nano X Unknown (Pure Grey 5 / Black / White) With these men's mid-cut shoes you'll be ready. The textile upper and high collar provide extra coverage and support. Added midsole cushioning and a decoupled outsole make them more comfortable than ever before. This is the colorway shown in most of these photos.

Nano X PR (White / Pure Grey 2 / Silver Met.) The newest version of the Reebok Nano X is made with lightweight materials that help you get an extra rep or PR. Rogue Fitness is also selling the Nano X PR - but for $10 cheaper than Reebok! Get it while it lasts...

Nano X Froning (Men's - Black / White / Reebok Lee 7) Known as The Fittest Man in History, Rich Froning Jr., joins the Nano franchise with these men's shoes. They were designed to fulfill all the needs of an elite athlete. Coming July 21st - these WILL SELL OUT!

Reebok Nano X (Cool Shadow/Black/White) Men's Training Shoe in Cool Shadow/Black/White.

Reebok Nano X (Black/White/White) Men's Training Shoe in Black/White/White

Vertex Micro Crew Ultra-Light Cushion (Darn Tough) You know what kind of sock works best with a lightly cushioned cross trainer like the Nano X? Get a running or athletic sock with some padding in the heel and fore foot - like these from Darn Tough. Merino wool/Nylon/Lycra Spandex - made in the USA

Reebok Nano X Unknown – Video Review on our YouTube Channel

Why read when you can watch? Here’s our first hands-on look at the unknown, from our YouTube channel:

By the way, we have high expectations for this shoe. The Reebok Nano X was a runner-up in our Best CrossFit Shoes for 2020 review.

Reebok Nano X Unknown – Overview

Let’s take a look…

Reebok Nano X Unknown Shoe Review - Side Profile
Starting with the obvious difference – this is a mid-cut shoe.

Mid-cut means not quite high top. For comparison’s sake, here they are side by side with the NOBULL High Top Trainer – a shoe we tested recently.

Reebok Nano X Unknown Shoe Review - Versus NOBULL High Top 2
The Unknown (Or Unknwn?) is a mid-cut shoe. For comparison, that’s a NOBULL Trainer in High Top form factor behind it.

The shoe is mid-cut, but surprisingly light-weight at the same time.

How do they do this?

The upper is thin – very, very thin – all over.

Reebok Nano X Unknown Shoe Review - Laces
The upper is very thin – all over.

Reebok Nano X Unknown Shoe Review - Thin Tongue
The Tongue is thin, the forefoot is thin, the sides are thin – it’s thin all over – and as a consequence – doesn’t feel bulky.

It’s see through in some places.

Reebok Nano X Unknown Shoe Review - Upper See through
You can see through some parts of the upper – as they are made of a lightweight mesh.

Overall, the upper is a very different material as compared to the Flexweave upper on the regular Nano X.

It’s stretchy and comfortable too. Combine that with the Nano X’s gloriously wide toebox – and overall this shoe fits and feels great.

Reebok Nano X Unknown Shoe Review - Front to Back
Wide toebox plus stretchy upper means comfort. This shoe runs true to size.

By the way, like the regular Nano X – it runs true to size.

Let’s take a close-up look at the upper.

Reebok Nano X Unknown Shoe Review - Upper Closeup
Upper is very comfortable.

How about the rest of the shoe?

The outsole, midsole, and insole seem unchanged from the regular shoe – despite Reebok’s claim of “more cushion” – it feels to be the same.

Reebok Nano X Unknown Shoe Review Outsole Closeup
The heel and outsole look to be identical to the regular Nano X – but Reebok claims more cushion inside in the midsole. If there is – it’s not a difference you can feel.

It looks the same too.

Here’s one key difference though – there’s no heel cup / heel counter inside on the Nano X Unknown.

How could there be? It’s too thin.

Reebok Nano X Unknown Shoe Review - No Heel Cup Inside
There’s no rigid heel cup inside the heel of the unknown. Combine this with the very thin upper and it feels not bulky – but will it be supportive?

If you felt like the Nano X regular was too bulky feeling, this is possibly your better option. It doesn’t feel bulky.

It does in fact weight 1 ounce less than the regular shoe (Men’s US Size 11).

But without a heel cup and with the very, very thin upper – will it offer the support you want from a mid-cut shoe?

You’ll probably need to try these on and decide for yourself.

There’s a heel pull tab – to help with putting these on.

Reebok Nano X Unknown Shoe Review - Heel Pull Tab
Pull tab on the heel is labeled "unknwn".

Overall, these feel much like the regular Nano X- but less bulky.

Because the insole/midsole/outsole are the same, I assume it’s the same 4mm heel to toe drop as the regular.

Reebok Nano X Unknown Versus Nano X Regular

In contrast the regular Nano X feels heavier (it is!) and bulkier.

Reebok Nano X Unknown Shoe Review Versus Regular Edition 1
Reebok Nano X – a great CrossFit training shoe for the year 2020.

It’s also $20 cheaper.

Reebok Nano X Unknown Shoe Review - Outsole
Outsoles are the same.

Here’s where the regular edition differs – it’s thicker all over the upper – the tongue, sides, forefoot – all over.

Reebok Nano X Unknown Shoe Review - Tongue Side by Side
Side by side, you can see the differences in upper thickness.

Reebok Nano X Unknown Shoe Review - Versus Regular Edition Heel
Heels appear the same …. but ….

Reebok Nano X Unknown Shoe Review - No Heel Cup Inside
There’s no rigid heel cup inside the heel of the unknown. Combine this with the very thin upper and it feels not bulky – but will it be supportive?

Overall I think both shoes are a winner. We’ll see how well the lighter materials of the Unknown stand up over time.

Reebok Nano X Unknown Shoe Review - Versus Nano X regular 3
Reebok Nano X Versus Nano X Unknown

By the way, the Nano X Unknown is also lighter than the Nano X PR (Personal Record).

Reebok Nano X Unknown Shoe Review - Versus PR Edition side by side
The Personal Record (PR) edition of the Nano X was supposed to be lightweight – but it’s not. The Unknown is the lightweight Nano…

The PR is theoretically a lightweight shoe – but actually weighs the same as the regular shoe.

Reebok Nano X Unknown Versus Nike Metcon 6

How does the Unknown compare to the Nike Metcon 6?

Reebok Nano X Unknown Shoe Review - Versus Nike Metcon 6
The Nike Metcon 6 is our favorite CrossFit shoe for the year 2020.

The Metcon 6 is basically the Metcon 5 – plus a super breathable upper.

Nike Metcon 6 Upper
The big change in the Metcon 6 (from the 5) is the all-new super-breathable upper. You can see through those massive perforations!

Nike Metcon 6 - Sunlight
See all that light shining through? These perforations are very big and that makes for great airflow.

The Metcon 6 is a versatile shoe – thanks to the hyperlifts (switch from 4 mm drop to 12 mm of drop) and the dual-density midsole. It’s got cushion in the forefoot and stability in the heel.

Nike Metcon 6
The Nike Metcon 6 is a good looking shoe. This is one of the launch colorways. Check out that massive rope wrap at the midfoot!

Overall the Nike Metcon 6 is the more versatile shoe.

But – what if you don’t like how it fits? What if you don’t like the radical looks? That’s why it’s good to have options.

Reebok Nano X Unknown- In Summary

The Reebok Nano X Unknown is a departure from the regular Nano X.

It’s lighter and feels less bulky – but overall delivers the stability and comfort you expect in a Nano CrossFit shoe.

Will it be durable over time?

Check back in the future and we’ll let you know.

Reebok Nano X Unknown Shoe Review - Front Quarter
Reebok Nano X Unknown – we like it! Comfort and less bulk with Nano stability.

Photo Credits

Some product photos on this page are property of Reebok.

This website is not affiliated or associated with CrossFit, Inc. CrossFit is a registered trademark of CrossFit, Inc.

Reebok Nano X Unknown Shoe Review - Front to Back Again
Reebok Nano X Unknown

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Reebok Nano X Unknown Shoe Review - versus NOBULL High Top 1
Mid-cut shoe (Nano X Unknown) versus NOBULL High Top Trainer.

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