Salomon X Ultra 5 Mid GTX hiking boots review: light and grippy for technical trails, but a few edits are needed to improve lacing and comfort

Salomon X Ultra 5 Mid GTX: first impressions 

This generation of the Salomon X Ultra is designed to be both agile and technical for those who want to move fast and confidently on tricky trails. This lightweight hiking boot is actually a little heavier than the previous edition, but it's also more durable, thanks to upgrades like Matryx uppers in place of leather and synthetic, and improved overlays that will protect your toes from just about anything.

The Contragrip outsole has extremely aggressive lugs that have held up on rocky, slick, and muddy surfaces this summer, and look built for winter conditions too. A chunky foam midsole is designed for a plush ride over longer distances, while the "Advanced Chassis," a molded insert embedded in the outsole, increases lateral stability on uneven terrain without losing flexibility.

The waterproof membrane will keep your feet dry if you meet with heavy rain, wet grass, or multiple river crossings, but in milder conditions, it might also mean sweaty feet. Water protection is aided by the mid-height cuff, which is just high enough to keep water out in a shallow stream and protect your ankle bone.

The cuff and tongue are unusually plush, and that, combined with a lack of eyelets, makes it a little difficult to get a lockdown fit here. They also run a little small and narrow, so if you buy your normal size, you might find that what you gain in lightweight technical creds, you lose in comfort.

It's a shame because with just a few small fixes, these could be a really great pair of capable hiking boots for those who want to roam far and fast.

Salomon X Ultra 5 Mid GTX: in the field 

This is only my second time testing out Salomon hiking boots, having tried the Elixir Mid Gore-Tex a couple of years ago and finding them an odd mix between overly stacked and unnecessarily technical.

I first tested these out during a hiking and camping trip in the Yorkshire Dales earlier this summer, and have since followed up on a couple of trails here in Scotland.

Here’s how they performed:

Sizing, fit and comfort

I always test a UK 4 which is usually a US 6, and that typically gives my feet room to swell (or wear thick socks), but I ran into a hitch with these shoes. Salomon's sizing comparison is slightly off, so the UK 4 turned out to be only a US 5.5. And that half size makes quite a difference, as it turns out.

As excited as I was to get them on, when I saw how robust and technical they looked, I was a little worried that they'd be too tight to test. I think they run a little small and a little narrow. With thick socks on, my toes come all the way up to the end with no room to wiggle, but since it was summer, I wore my thinnest socks, and though they were tighter than I'd like, I was able to hike in them without blisters.

The lack of blisters didn't mean that I experienced out-of-the-box comfort, however. In fact, I found I experienced quite a bit of rubbing and toe bashing during my first hike, and actually couldn't wait to get out of them when I got back to the car. I had brought a backup pair of boots for that first trip and ended up wearing them the next day to give my feet a chance to recover, then tried these again on day three, and they were slightly better once broken in.

That said, I think a few things are contributing to the comfort issue for me. There's the odd sizing and narrow fit, which doesn't give my toes room to splay, and the cuff and tongue are just about the plushest I've ever seen. That, combined with just two eyelets, makes it nearly impossible for me to get a good lockdown fit, and the fact is that my toes take a beating when I descend. I think sizing up would help, but I'm not sure how to get around the lacing problem.

Breathability and protection

Another area where comfort leaves something to be desired is that I don't find these to be the most breathable of shoes in the summer months. I've had them out in wet weather, but it's always been mild, and I notice my feet are sweatier than in other lightweight waterproof boots I own, such as my Lowa Renegade EVO GTX or Helly Hansen Switchback Trail HT.

The flip side of that is that they are fully waterproof, which I tested out by standing in a couple of small streams for a minute or two.

The uppers offer loads of good protection too, from the ultra durable Matryx uppers to the robust reinforcements around the toes. The cuff isn't super high, but it's just high enough to keep my ankle bones protected and means I can splash through flooded trails without breaking stride.

Grip and stability

I'm a little sceptical of a boot that doesn't use a Vibram sole, but I have to admit that these Contragrip soles are a really good match for British conditions, which tend to involve muddy slopes, boggy crossings, and slippery rock and slate. The lugs seem able to bite into just about anything, and I did find some confidence in that.

Salomon has gone all in on stability with these boots, using the advanced chassis to provide lateral support in the footbed and what it calls 'mobile wings' in the design of the upper to help hold your foot in place. This is all integrated without losing flex, and the idea is that you can move quickly when the going gets tough.

I tend to notice the lack of stability more in running shoes than I do in hiking boots, but I will say that these boots do respond well to uneven terrain. They'd do an even better job if I could get a more secure fit, however, and I couldn't help wondering if the reason my foot wasn't sliding around was that there wasn't any extra room for it to do so.

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