Mammut Aenergy TR BOA® Mid GTX Men's Hiking Boots

The dimensions specified by each manufacturer may vary.

Here is a size chart specifically designed for Mammut shoes , which lists the dimensions in millimeters.

To accurately determine the size you need, we recommend measuring your foot length in millimeters.

Stand against a wall or other 90-degree vertical plane on the floor with your full weight so that your heel touches the wall/plane.
Mark where the thumb ends.
Measure both feet . If your feet are different sizes, choose the size of the larger foot when determining the size.
See the table below.

For hiking shoes, we recommend purchasing at least 1 - 1.5 sizes larger than your everyday shoe size.

In hiking shoes, your toes should not hit the toe!

This is because after a long walk, your feet swell and an otherwise good-sized shoe will start to squeeze! This is the most common reason why your feet and toes hurt. In the most serious cases, you can even lose your toenails due to the wrong size of hiking shoes.

Example : Measured foot size in millimeters 250 mm or EU 40. Hiking shoes should be chosen starting at 260 mm or EU 41 1/3.

Size chart

EU Size	Millimeters	UK size
37 1/3	230	4.5
38	235	5
38 2/3	240	5.5
39 1/3	245	6
40	250	6.5
40 2/3	255	7
41 1/3	260	7.5
42	265	8
42 2/3	270	8.5
43 1/3	275	9
44	280	9.5
44 2/3	285	10
45 1/3	290	10.5
46	295	11
46 2/3	300	11.5
47 1/3	305	12
48	310	12.5
48 2/3	315	13

Do Mammut shoes fit standard EU sizes?

Mammut shoes are small in size.

On average 0.7 EU sizes smaller than other brands. Mammut EU sizes are converted from Mondo using the Mammut formula, which differs from the standard international system used by most other brands.

Please contact us if you have any additional questions!

Trail running shoes with Boa closure

Premium trail running shoes for medium to long-distance runs. Vibram Megagrip sole with Litebase technology to tackle the most challenging terrain with less weight.

A comfortable midsole made of responsive EVA foam, a precise fit with the BOA® Fit system, reflective details, and a GORE-TEX waterproof membrane make the Aenergy high-performance shoes that will not let you down, even on the most demanding runs.

Mammut SOFtech™ combines the second and third clothing layers to offer good protection in various weather conditions. The wear-resistant materials are extremely flexible and breathable to ensure good temperature regulation.

3M reflective elements
BOA® Fit System closure: precise fit and micro-adjustment. Easy to use even with gloves.
Soft midsole for medium to long distance runs.
Protective rubber
Flexible knit sock construction
Vibram Megagrip sole with Vibram Litebase technology
Waterproof Gore-Tex membrane

Fair Wear. Fair Wear works to ensure fair and safe working conditions in garment factories. The non-profit organization works directly with factories, unions, NGOs and governments to protect workers' rights.
DWR without PFC. (Durable Water Repellent) water-repellent treatment without PFC. Perfluorinated compounds (PFCs) are often used for waterproofing, but they are virtually non-biodegradable. Mammut is committed to replacing non-biodegradable fabric processing with more sustainable, high-performance alternatives.
Recycled. This product contains recycled materials with uncompromising performance and functionality. Choosing recycled materials reduces the use of raw resources and helps promote a circular economy.