Verdict from 4 experts and +100 user reviews

7 reasons to buy

  • Comfort: Most of the users say that the Merrell MTL Skyfire offers a pleasant in-shoe feel. 
  • Weight: Several runners have testified that the shoe is light on the foot. 
  • Sockless wear: The shoe is comfortable even when worn without socks, said a wearer.  
  • Breathability: Some consumers notice that the upper material allows for continuous ventilation.
  • No pain: Multiple testers confirm that the MTL Skyfire doesn't cause any rubbing or swelling. 
  • Versatility: A few purchasers mention that it is suitable for both trail runs and hiking. 
  • Aesthetics: The shoe’s style and color combinations have gained praise from numerous consumers.

2 reasons not to buy

  • Midsole: A couple of buyers desire more cushioning. 
  • Durability: A handful of testers observe that the outsole starts to wear off after only a few months of use.

Bottom line

Built with a lightweight design, the Merrell MTL Skyfire is created to deliver a fast and efficient ride on various terrain. It is constructed using highly durable materials that aim to provide long-lasting comfort and protection. This trail running shoe is suitable for athletes with neutral gaits or those who do not overpronate.

Tip: see the best trail running shoes.

Good to know

The Merrell MTL Skyfire shoe is the latest style from the Merrell Test Lab. It is a vegan-friendly trail running shoe, which means that no animal products are included in the platform. This race-ready shoe is designed to help the runner to go fast in the mountains. 

Featuring a tear-resistant upper and an aggressive mountain-grade outsole, the MTL Skyfire is designed to withstand the most extreme and rugged environments. It incorporates a responsive foam midsole, which helps absorb impact and offers a high level of comfort while running over the challenging trails.

The Merrell MTL Skyfire is available in standard shoe length for both men and women versions. It is recommended to try the shoe in-store before making a purchase decision to ensure a perfect fit.

This running shoe utilizes the lace-up closure and bootie tongue construction for a secure and customized fit. A removal insole is also used for added comfort and support.

An aggressive mountain-grade rubber called the Quantum Grip™ is integrated into the outsole of the Merrell MTL Skyfire. It is a newly developed rubber outsole from Merrell that supplies versatile traction and grip on both wet and dry surfaces. The rubber outsole offers stability while running over the rugged terrain. 

A protective rock plate is positioned between the outsole and midsole sections. This element is used to protect the foot from sharp objects.

This Merrell trail running shoe utilizes an ethylene-vinyl acetate or EVA foam midsole for shock absorption. The EVA foam is a soft and elastic midsole material that is used to provide comfort and responsiveness. 

A removable EVA foam insole is included to provide added underfoot protection. This material also allows the runner to adjust the comfort level of the shoe.

The Merrell MTL Skyfire is constructed with a durable upper using tear-resistant fabric. This abrasion-resistant material does not only protect the foot from the trail elements but also keeps the platform lightweight. Breathable mesh lining is also utilized to ensure that foot stays dry and comfortable for an extended period. 

To provide added durability, TPU overlays are included in the upper. The overlays lend support and provide structural integrity. 

Reflective details are incorporated into the shoe for increased visibility during low light runs. Another popular running shoe that features reflective details is the Altra Escalante 1.5

Merrell re-engineered their tongue bootie construction to provide a snugger in-shoe feel. The tongue is overlaid with a supportive midfoot cage that helps deliver a secure lockdown fit.  

The closure system of this lightweight running shoe is the traditional lacing system. It delivers an adjustable fit that suits the user’s preference.


How Merrell MTL Skyfire ranks compared to all other shoes
Top 15% trail running shoes
All trail running shoes
Top 9% Merrell running shoes
All Merrell running shoes
Top 18% neutral running shoes
All neutral running shoes


The current trend of Merrell MTL Skyfire.
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Jens Jakob Andersen
Jens Jakob Andersen

Jens Jakob is a fan of short distances with a 5K PR at 15:58 minutes. Based on 35 million race results, he's among the fastest 0.2% runners. Jens Jakob previously owned a running store, when he was also a competitive runner. His work is regularly featured in The New York Times, Washington Post, BBC and the likes as well as peer-reviewed journals. Finally, he has been a guest on +30 podcasts on running.