Mammut Aenergy Trail Endurance Ultra Low vs Merrell MTL Skyfire 2

Mammut Aenergy Trail Endurance Ultra Low

€220

Merrell MTL Skyfire 2

$200

Quick verdict

Mammut Aenergy Trail Endurance Ultra Low

€220

The better pick if you want:

More cushioning (38 vs 25 mm heel stack)

Merrell MTL Skyfire 2

$200

The better pick if you want:

A higher overall score (87 vs 75)
To spend $20 less
A lighter option (110 g less)
A lower drop (6 vs 8 mm)
Deeper lugs for grip (5 vs 4 mm)

Spec profile

Each axis ranks against the 174 products in Shoes on the site: the further out, the more it stands out in that spec (lighter, cheaper…).

Center: lowest in the category · Edge: highest

Mammut Aenergy Trail Endurance Ultra Low· leads in 1

Cushioning

Merrell MTL Skyfire 2· leads in 2

LightnessGrip

Tied

Affordability

Cushioning
38 mmTop 23%
25 mm
Lightness
320 g
210 gTop 1%
Grip
4 mmTop 50%
5 mmTop 13%
Drophigher isn't better or worse
8 mm
6 mm
Affordability
$220
$200

Technical Specifications

Compare features between Mammut Aenergy Trail Endurance Ultra Low vs Merrell MTL Skyfire 2

Best value in this comparisonOnly differences (14)

Essentials

€220

$200

2026

April 2023

320 g

210 g

Overview

Trail Running Shoe

technical trails, long-distance mountain terrain

Technical trails

—

Fast technical trail running and racing

Cushioning

8 mm

6 mm

38 mm

25 mm

30 mm

19 mm

Dual-density Mammut CORE Plus and CORE Ultra foam with FLEXTRON PRO propulsion plate

Dual density FloatPro™ foam

High cushioning with powerful energy return, A6 flex index

—

Grip & protection

Vibram® Megagrip with Litebase technology and traction lugs

Vibram® MegaGrip high performance rubber

360° reinforced TPU band against rocks and debris

—

Upper & fit

Technical mesh with textile lining

—

Ortholite® 5 mm sockliner

EVA foam footbed

Ready to buy?

On the terrain

How Mammut Aenergy Trail Endurance Ultra Low vs Merrell MTL Skyfire 2 should behave on each kind of ground, estimated from lug depth, stack height, weight and outsole rubber. Pick a ground to see what decides it.

Pick a ground							Average
Mammut Aenergy Trail Endurance Ultra Low							54
Merrell MTL Skyfire 2							74

FlatPacked, runnable trail

Cushioning and low weight make the kilometres easier; very deep lugs squirm on hard ground.

Mammut Aenergy Trail Endurance Ultra Low69

Cushioning36/40
Lightness8/35
Smooth roll25/25

Merrell MTL Skyfire 272

Cushioning20/40
Lightness35/35
Smooth roll17/25

A model built from the specs to compare shoes, not a lab measurement.

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Video Reviews

Watch real-world YouTube reviews from content creators and the Trail Running community.

See all 10 video reviews

Mammut Aenergy Trail Endurance Ultra Low

Merrell MTL Skyfire 2

Visual Comparison

See the differences between Mammut Aenergy Trail Endurance Ultra Low and Merrell MTL Skyfire 2 in a side-by-side slider comparison.

Comparison Questions

Answers based on product data and key differences.

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Frequently Asked Questions

Which offers better value: Mammut Aenergy Trail Endurance Ultra Low vs Merrell MTL Skyfire 2?

For value comparison: The Mammut Aenergy Trail Endurance Ultra Low ($220) provides premium features compared to the Merrell MTL Skyfire 2 ($200). Consider your budget and the specific features that matter most for your trail running setup.

Which is newer, the Mammut Aenergy Trail Endurance Ultra Low or the Merrell MTL Skyfire 2?

The Mammut Aenergy Trail Endurance Ultra Low is newer: it came out in 2026, and the Merrell MTL Skyfire 2 in April 2023.

Looking for alternatives to Mammut Aenergy Trail Endurance Ultra Low?

Closest in price, with what each one does better.

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Dynafit Ultra DNA

Dynafit

$219.95−$0.05Score 81+6

Better than Mammut Aenergy Trail Endurance Ultra Low at:

A higher overall score (81 vs 75)
A lighter option (40 g less)

Compare with Mammut Aenergy Trail Endurance Ultra Low

Dynafit Alpine DNA 2

Dynafit

$219.95−$0.05Score 78+3

Better than Mammut Aenergy Trail Endurance Ultra Low at:

A higher overall score (78 vs 75)
A lighter option (60 g less)
A lower drop (6 vs 8 mm)

Compare with Mammut Aenergy Trail Endurance Ultra Low

Adidas Terrex Agravic Speed Ultra 2

Adidas

$225+$5Score 89+14

Better than Mammut Aenergy Trail Endurance Ultra Low at:

A higher overall score (89 vs 75)
A lighter option (51 g less)

Compare with Mammut Aenergy Trail Endurance Ultra Low

Popular Comparisons

Compare Mammut Aenergy Trail Endurance Ultra Low or Merrell MTL Skyfire 2 with other top trail running shoes from brands such as Mammut, Merrell and more.

Shoes

Quick verdict

Mammut Aenergy Trail Endurance Ultra Low

€220

The better pick if you want:

More cushioning (38 vs 25 mm heel stack)

Merrell MTL Skyfire 2

$200

The better pick if you want:

A higher overall score (87 vs 75)
To spend $20 less
A lighter option (110 g less)
A lower drop (6 vs 8 mm)
Deeper lugs for grip (5 vs 4 mm)

Spec profile

Each axis ranks against the 174 products in Shoes on the site: the further out, the more it stands out in that spec (lighter, cheaper…).

Center: lowest in the category · Edge: highest

Mammut Aenergy Trail Endurance Ultra Low· leads in 1

Cushioning

Merrell MTL Skyfire 2· leads in 2

LightnessGrip

Tied

Affordability

Cushioning
38 mmTop 23%
25 mm
Lightness
320 g
210 gTop 1%
Grip
4 mmTop 50%
5 mmTop 13%
Drophigher isn't better or worse
8 mm
6 mm
Affordability
$220
$200

Pick a ground

Average

Mammut Aenergy Trail Endurance Ultra Low

Merrell MTL Skyfire 2

Mammut Aenergy Trail Endurance Ultra Low vs Merrell MTL Skyfire 2

Mammut Aenergy Trail Endurance Ultra Low

Merrell MTL Skyfire 2

Quick verdict

Spec profile