Verdict from 9 experts and +100 user reviews

6 reasons to buy

  • The customers felt extremely comfortable with the soft cushioning of the Merrell Agility Peak Flex.
  • A majority of the runners preferred this shoe for trail running and trail walking, owing to its flexible build that’s suited for rough terrains.
  • Many of its wearers were happy with the supportive mid-sole because they felt less pressure under their feet.
  • Customers were also happy with the snug fit and adjustable nature of the shoe; it remained true to their size on almost every ground level.
  • A few buyers were attracted by the colors available for this shoe.
  • A runner felt an increase in his mobility in these shoes during his run; the shoes adjusted to the feet’s movements better than any shoes he had tried in the past.

2 reasons not to buy

  • A customer felt some reduction in his grip on the ground during his uphill runs.
  • Another user was dissatisfied with the construction of the upper’s heel area because it didn't provide enough support as other running shoes he had used before.

Bottom line

Merrell Agility Peak Flex, known for its agility and support on a variety of terrains, is an ideal shoe for trail running and hiking. It also satisfies the fashion sense of conscious customers through its nice aesthetic look and may be used daily as casual footwear. Overall, the shoe is an excellent package of comfort and flexibility and provides a perfect fit for the runner's foot.

Tip: see the best trail running shoes.

Good to know

  • The Merrell Agility Peak Flex uses a mesh upper with a mud-resistant coverage that adds to its durability. The top is composed of a seamless, soft fabric with the Merrell Omni-Fit™ lacing closure, which ensures a glove-like fit for the runner's foot.
  • It also utilizes M Select Fresh agents in the construction of its upper and they are responsible for the disruption of unpleasant odors. This keeps the shoe clean and fresh for a longer period of time.
  • The interesting reflective design of the upper enables the shoe's visibility in the dark. The shoe also has the EVA Removable Footbed, which ensures a better experience of comfort and cushioning for the runner.
  • The midsole of Merrell Peak Flex features the EVA material. This material is flexible, responsive and durable. The EVA midsole along with the FLEXconnect™ technology results in a balanced and agile movement for the wearers on uneven terrains, while also presenting a reliable and a soft-cushioned environment.
  • Lastly, M Select™ GRIP+ technology has been used in the shoe's outsole to ensure stable movement and the needed traction on wet and dry surfaces. This technique is actually a skeleton-inspired design and it follows the natural anatomy of the human foot. With this outline, runners are able to move more naturally through the gait cycle.

Merrell Agility Peak Flex is available in the standard medium widths of D and B for men and women respectively. This shoe is slightly larger than the regular measurements. It is recommended for runners to purchase ½ size smaller in order to get a more agreeable fit.

The outsole of Merrell Agility Peak Flex employs the M Select™ GRIP+ mechanism for enhanced traction. It actually has a skeletal lugged design, which extends throughout the outsole and is responsible for multi-directional traction and natural foot flexibility. This saves the runner from worrying about the slips and injuries.

The midsole of the Peak Flex has the FLEXconnect™ EVA (Ethylene Vinyl Acetate) compound - a very soft, durable and lightweight material that performs well even in the harshest conditions. This foam also has flex grooves. These small indentations make the platform more adherent to the natural motion of the foot.

The shoe is also provided with a removable sock-liner called the EVA Removable Footbed. It is used under the foot for additional cushioning. As a result of this sock-liner, the runners get a more comfortable and plush feel while running. As suggested by its name, it can be removed or replaced.

The upper of the shoe has the fabric mesh material with TPU coverage, which is not only durable but also mud resistant. The technique prevents the shoe from wear and tear, as well as mud infiltration. The Hyperlock molded TPU heel counter helps in locking the foot in place and preventing it from exiting the shoe accidentally.

The Merrell Omni-Fit™ lacing system helps in keeping the foot in its proper position. It works in cooperation with the padded collar & tongue, and it provides a glove-like fit to the user.

The M Select Fresh construction keeps the interior environment healthy and clean by staving off odor-causing microbes.

The shoe also has a sock-liner called EVA Removable Footbed. It may be placed under the foot for additional cushioning.

Reflective Detailing makes the Agility Peak Flex more visible in the dark. This gives the runner the additional benefit of performing well even in low-light conditions.


How Merrell Agility Peak Flex ranks compared to all other shoes
Top 32% trail running shoes
All trail running shoes
Top 23% Merrell running shoes
All Merrell running shoes
Top 48% maximalist running shoes
All maximalist running shoes


The current trend of Merrell Agility Peak Flex.
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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.