Verdict from 14 experts and +100 user reviews

6 reasons to buy

  • The upper for the All Out Rush is made up of breathable and durable air mesh with TPU.
  • It has protective toe cap that shields the foot from debris when running on rough surfaces.
  • The Merrell All Out Rush has reflective details for increased visibility while running under low lighting conditions.
  • The UniFly mid-sole unit is a soft layer of cushioning that’s firm yet responsive.
  • It features the M Select™ GRIP technology for an impressive traction when use in varied terrains.
  • Some runners were satisfied with the flexibility of the shoe.

3 reasons not to buy

  • Based on some comments, this running shoe was not comfortable to wear and some experienced foot pain and blisters.
  • Some experienced heel slippage.
  • The toe area was too tight for some runners.

Bottom line

The All Out Rush from Merrell is a trail running shoe that is ideal for light trails and rough terrains. Some of the testers felt that its dimensions were off and that it didn’t provide the most comfortable experience, but this shoe offers great durability, traction and flexibility.

Tip: see the best running shoes.

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Good to know

  • Merrell takes the All Out line to another level by not just adding something to a barefoot experience. In the All Out Rush, Merrell features a shoe that can suitably function as a hiking cleat because of its large and tank-like outsole. Although the outsole is quite firm and very thick, it does weigh much lighter than it looks.
  • The continuous outsole also gives the shoe a high-level of durability and stability with flexibility as the trade-off. Because the outsole is one solid mass of rubber, runners can expect a more stable, durable platform at the cost of limited flex or less natural movement.

Merrell’s trademark snug fit in the heel and midfoot with a wide toe box is clearly present in the All Out Rush. The delightful locked in feel of the heel and midfoot that widens to a spacious toe box usually benefits most runners. Medium is the offered width of this shoe. Sizing is fairly regular with options from 6 to 14 for the men’s and 5 to 11 for the women’s.


The whole chunk of the outsole is dominated by circular lugs with a few opposite facing rubber configurations in the forefoot and the heel for enhanced downhill or uphill movements. Merrell uses its own M Select Grip rubber compound all throughout the outsole for optimal traction on different outdoor surfaces.


The whole midsole is blanketed by the Merrell-unique UniFly. This foam is made of premium-grade EVA together with Merrell’s own technologies to give it excellent rebound features and cushioning. It also allows decent ground feedback despite the adequate support and protection. Underfoot protection is increased by firm plates that are located in the heel and the forefoot.


The AirMesh is a proven material in providing excellent breathability. With numerous overlays from the midfoot to the heel, the All Out Rush offers serious midfoot and heel lockdown feel. The unique Omni-Fit lacing system gives runners a glove-like and dialed in fit. Lastly, reflective details in the upper make running in low-light conditions safe and quite a treat.

How All Out Rush compares

This shoe: 82
All shoes average: 82
55 94
This shoe: $120
All shoes average: $130
$60 $250
This shoe: 11.1oz
All shoes average: 10.4oz
6.3oz 24oz
Author
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.

jens@runrepeat.com