Adidas Terrex Free Hiker review

Adidas Terrex Free Hiker review and lab test

The Adidas Terrex Free Hiker is a super-modern, super-comfy, super-noticeable hiking boot. With plenty to compliment, there are also some bugbears which may be enough to convince people who need a serious boot to take them off-road.

Who should buy this hiking shoe

The Adidas Terrex Free Hiker is a stylish hiking boot with a sock-like fit that’s great for well-beaten trails and gravel paths. With an emphasis on street style and plush comfort, these are an all-day, easy-going boot perfect for more urban environments.

Who should NOT buy the Adidas Terrex Free Hiker

Being more of a fashion boot, I think that you have to reconsider if you: 

• Want way more cushioning and support. Check out the Hoka Kaha 2 GTX
• Want a boot with waterproofing. I suggest heading to the Hoka Trail Code GTX.

Weighs next to nothing

Coming in at 14.6oz (415g) the Adidas Terrex Free Hiker is one of the lightest hiking boots on the market, just trailing my favourite hiking boot, the Salomon X Ultra 4 Mid GTX. It’s marketed as being under the 14.1oz (400g) mark, but I found this to be a bit heavier in a US 10. 

The featherweight design comes down to the superlight ‘Ultraboost’ foam and the low-key knitted sock liner that constitutes an upper. 

Is the Adidas Terrex Free Hiker a hiking boot?

I have a sneaking suspicion that the Terrex Free Hiker is not really a hiking boot. Sure, it looks a bit like a hiking boot, and Adidas markets it as a hiking boot, but there are a few warning signs that suggest it might not be a brilliant choice for out on trails. 

Firstly, the boots’ most notable feature, the colorways. Adidas is standing out from the crowd of mundane beiges, greys, and blacks, which is great to see. But different iterations have different materials, and therefore will respond differently to conditions.

This follows more of a pattern seen in the sneaker market, where the same silhouette will be released in multiple materials. This isn’t an instant deal-breaker for me, but it’s definitely something to bear in mind.

An Ultra-comfortable midsole, but for how long?

The three-stripe “ultraboost” foam has been making waves on the running and sneaker scene for some time now. Super soft at 21HA (average is 29HA), the midsole feels a lot more comfortable straight away than most hiking boots.  

Again, this departure from the mainstream design of hiking boots may not be as great as it seems. Whilst it’s certainly comfortable underfoot, I’d usually plan to get 750 miles out of a pair of hiking boots before the outsole gives in. 

Looking at the Ultraboost foam (with previous experience of their running shoes), I’m worried that the foam might be next to useless after 300 miles. 

The Adidas Terrex Free Hiker has the flex of a proper boot

This is one of the areas that the Free hiker really excelled. With a flexibility score of 42.1N (average score for boots in 37.4N), there’s some stiffness for support underfoot, which is welcome after the soft midsole. 

On flatter ground, you can feel the shoe giving some energy back, and on the uphills, there’s a good amount of pressure going into gripping the terrain. 

Requires more support

The knitted upper is a nice idea, and I love seeing a brand experiment with materials, but the huge issue is the lack of support and lockdown in the boot. 

Usually, the lacing on a hiking boot (or any technical footwear from running shoes to weightlifting shoes), is meant not just to keep the shoe tight on the top, but strap your foot and ankle into place to avoid injuries caused by excessive movement. 

The elastic nature of the upper means that this simply can not happen. Even though Adidas has moulded a hard plastic heel cup and added an elastic strap to the heel, the lacing fails to implement them properly. 

This is the main reason I wouldn’t suggest the Adidas Terrex Free Hiker to anyone looking to rely on it for a proper hike. 

The Adidas Terrex Free Hiker runs a little large

The boot is also slightly long, which is quite common for hiking boots, to accommodate thicker socks. If you’re planning on wearing these casually with normal socks, I’d suggest dropping half a size to stop your foot from sliding around. 

Phenomenal Grip

Adidas have got their grip dialled in almost perfectly. With a continental outsole moulded into 57 lugs, each 4.77mm deep, the boot doesn’t have any issues with different terrain. 

The rubber is incredibly durable as well, I reckon if Adidas put a more traditional midsole and upper in place these boots could last 750 miles+, maybe even 1,000!

The Adidas Terrex Free Hiker is as waterproof and breathable as it looks

I wasn’t expecting any protection from water in the Adidas Terrex Free Hiker, so they didn’t disappoint when my toes came out soaking after a brief encounter with a puddle. 

The flipside here is that the upper is extremely breathable and dries very quickly. You can always opt for the Salomon Outpulse GTX which is more waterproof but less breathable, depending on what you’re looking for. 

Conclusion

I sometimes feel harsh on boots like this, but the Adidas Terrex Free Hiker is missing some of the fundamentals of a solid (and safe!) hiking boot, namely support and durability. 

That being said, if you’re after the shoe for its looks, and don’t plan to rely on these for long, or technical trails, then you’re looking at an incredibly grippy, super-plush shoe!

Complete lab-specs overview