Quick verdict
The Mammut Aenergy Trail All-Mountain Low GTX is a technical all-mountain hiking shoe built for mixed British terrain, using a GORE-TEX Invisible Fit membrane for full waterproofing and a grippy Mammut outsole for wet rock and chalk. It runs an 8mm drop (34/26mm stack) on a CORE Plus foam midsole with an Ortholite insole, weighs about 310g per shoe (UK 8.5), and adds a 360-degree TPU rand for underfoot protection. At £145 it suits day hikers and fast walkers who want a low-cut, waterproof shoe with more grip and structure than a road-style trainer.
Mammut Aenergy Trail All-Mountain Low GTX: 4.6/5
A GORE-TEX all-mountain shoe with a grippy Mammut outsole, 8mm drop, CORE Plus cushioning and a full TPU rand, built for wet, mixed British trails.
The full review is below.
The Mammut Aenergy Trail All-Mountain Low GTX sits in an interesting spot. It is not a trail runner and it is not a walking boot. It is a low-cut, waterproof all-mountain shoe with the structure of a hiking shoe and the weight of a fast trainer, and that combination is exactly what a lot of British trails ask for.
Mammut builds it around a GORE-TEX Invisible Fit membrane, a CORE Plus foam midsole and a grippy Mammut outsole, then wraps the whole forefoot in a 360-degree TPU rand. The result is a shoe I would reach for on a wet Purbeck day walk or a rocky Brecon scramble where I want protection and grip but do not want the height and bulk of a full boot. At £145 it is priced as a serious piece of kit, and it earns it.
Who the Aenergy Trail is for
This is a shoe for day hikers and fast walkers who spend their time on mixed ground: chalk downland, coast-path mud, wet limestone, rooty forest tracks and the occasional rocky step. If your walking is mostly on that kind of terrain and you have decided a low-cut shoe suits you better than a boot, the Aenergy Trail is aimed squarely at you.
It also works for people who move quickly. The 310g weight (UK 8.5) and 8mm drop mean it never feels like a clog underfoot, so you can walk at pace or break into a jog on a fire road without fighting the shoe. That is the "all-mountain" idea Mammut is selling: enough cushioning and grip to cover a broad range of ground without specialising in any one thing.
Who should look elsewhere? If you carry a heavy multi-day pack or you have weak ankles, a low-cut shoe gives you no lateral support, and a mid or a boot will serve you better. And if your walking is almost all dry, hard trail in summer, a non-membrane shoe will breathe better. For a broader look at the alternatives, my best waterproof trainers roundup covers the field.
Waterproofing: GORE-TEX Invisible Fit
The Aenergy Trail uses GORE-TEX Invisible Fit, which laminates the membrane directly to the upper rather than hanging it inside as a loose bootie. In practice that means less internal bunching, a closer fit and slightly better breathability than an older-style GORE-TEX liner. On the trail it does the job: I have walked wet grass, shallow bog and rain-soaked chalk without water getting through the membrane.
The waterproofing itself is not the limit here. The cut is. This is a low shoe, so the waterproof protection stops at the ankle bone. Step into a puddle deeper than the collar, or spend an hour crossing saturated moorland where the water sits above the shoe line, and it will come in over the top like any low-cut design. That is not a fault of the membrane, it is physics, and it applies to every waterproof trainer.
For British three-season use that is a sensible trade. Most of what soaks your feet on a UK day walk is wet vegetation and surface water brushing the upper, and against that the membrane keeps you dry. Just know that in deep bog or a river crossing, a low-cut shoe has a ceiling, and gaiters or a mid boot are the answer if that is your regular ground.
Grip and outsole
The outsole is Mammut's own Swiss Design compound, and it is one of the stronger parts of the shoe. The lugs are deep enough to bite into mud and loose ground without being so aggressive that they feel awkward on hard trail or rock slabs. On wet British limestone and chalk, the two surfaces that catch most people out, it holds well, and that is the test I care about most on the Jurassic Coast in the wet half of the year.
There is a 360-degree TPU rand around the shoe too, which is more about protection than grip but earns its place. It shrugs off toe-stubs on rock and stops trail debris chewing the upper, and after a few months of use it is the kind of feature you stop thinking about because it just quietly works.
If I am comparing grip to nearby rivals, it is in the same league as the Salomon Genesis 2 GTX and the Meindl Respond GORE-TEX, which is good company to keep. It is a confident shoe on technical ground, and that confidence is what the "all-mountain" name is really promising.
Cushioning and fit
Underfoot you get Mammut's CORE Plus foam midsole with a 34/26mm stack and an 8mm drop. That is a moderate, versatile amount of cushioning: enough to take the sting out of a long day on hard-packed trail, but firm enough that the shoe stays stable on off-camber ground and rock. It is not a soft, max-cushion ride, and I would not want it to be for this kind of terrain. The Ortholite insole adds a bit of step-in comfort and holds its loft over time.
The fit is Mammut's typical secure, slightly performance-oriented shape. The Invisible Fit membrane keeps the interior clean and close, and the lacing pulls the midfoot down without hotspots. It is a medium-volume fit rather than a wide one, so if you have a broad forefoot, try before you commit. For most feet it runs true to size, though I would size up if you plan to wear thicker winter socks.
Colours
The Aenergy Trail All-Mountain Low GTX comes in three colourways. Savannah is the lead, an understated sand tone that hides trail dirt well. Black is the low-key everyday option, and Nebla / red is the brighter, more technical-looking choice.
Savannah
Buy the Mammut Aenergy Trail All-Mountain Low GTX (Savannah) at Mammut
Black
Buy the Mammut Aenergy Trail All-Mountain Low GTX (Black) at Mammut
Nebla / red
Buy the Mammut Aenergy Trail All-Mountain Low GTX (Nebla / red) at Mammut
Specs at a glance
| Spec | Detail |
|---|---|
| Membrane | GORE-TEX Invisible Fit (waterproof, windproof) |
| Outsole | Mammut Swiss Design rubber |
| Midsole | CORE Plus foam, Ortholite insole |
| Drop / stack | 8mm drop, 34/26mm stack |
| Weight | ~310g per shoe (UK 8.5) |
| Protection | 360-degree TPU rand |
| Price | £145 |
| Best for | All-round hiking on mixed British terrain |
Pros and cons
- GORE-TEX Invisible Fit keeps water out and breathes better than an old-style bootie liner
- Grippy Mammut outsole that holds on wet chalk and limestone
- 360-degree TPU rand adds real protection on rocky ground
- Moderate 8mm drop and CORE Plus cushioning suit long days and faster walking
- Light for a structured hiking shoe at around 310g
- Low cut, so no waterproofing above the ankle in deep bog or crossings
- Medium-volume fit is snug for broad forefeet
- £145 is a serious price for a low-cut shoe
Verdict
The Mammut Aenergy Trail All-Mountain Low GTX earns a 4.6 out of 5. It is a properly capable all-mountain shoe: waterproof where a low cut can be, grippy where it counts, protective on rock and light enough to move quickly in. For UK day hikers who walk mixed terrain in the wet half of the year and prefer a shoe to a boot, it is one of the more complete options on the market.
Buy it if you want a technical, waterproof low-cut shoe with real grip and structure, and you are happy paying for build quality. Look at Mammut's own Sertig III Low GTX if you want the same idea at a lower price, or browse the full waterproof trainers category for more.
Buy the Mammut Aenergy Trail All-Mountain Low GTX at Mammut
