• Discontinued
  • Terrain


    Shoes best for road, track and light gravel. See the best road shoes.


    Shoes best for trail, off road, mountains and other unstable surfaces. See the best trail shoes.

    Good to know

    As long as you stick to the road or path, and if you want just one running shoe, buy a road running shoe.

  • Arch support

    Neutral / cushion / high arch

    Shoes for runners who do not need any additional arch support (Around 50% of runners). Best for people with normal, high or medium high arches. See the best neutral shoes.

    Stability / overpronation / normal arch

    Shoes for runners who need mild to moderate arch support (Around 45% of runners). Best for runners with a low arch. See the best stability shoes.

    Motion control / severe overpronation / flat feet

    Shoes for runners who needs a lot of arch support. Best for runners with flat feet. See the best motion control shoes.

    Good to know

    - Rule of thumb: If in doubt, buy neutral shoes to avoid injuries.
    - More about arch support in this video.
    - Find your arch type by following steps from this video.

  • Use

    Daily running

    Cushioned shoes for your daily easy running. Great comfort. See best shoes for daily running.


    Lightweight shoes good for races, interval training, tempo runs and fartlek. Here are the best competition running shoes.

    Good to know

    If you want just one pair of shoes, buy a shoe for daily running.

  • Price
  • Weight
    Men: 8oz
    Women: 6.5oz
  • Heel to toe drop
    Men: 6mm
    Women: 6mm

    The height difference from the heel to the forefoot, also known as heel drop, toe spring, heel to toe spring or simply drop.

    There are many opinions about what a good heel drop is. We do not recommend any in particular. Lean more in this video.

  • Heel height
    Men: 18mm
    Women: 18mm
  • Forefoot height
    Men: 12mm
    Women: 12mm
  • Width
    Men: Normal
    Women: Normal
  • Release date
Show more facts


Expert Reviews

Experts are runners, who post reviews at youtube, directly at RunRepeat or at their own websites. Each expert is categorized from level 1 to level 5 based on expertise. See stats on expert reviews and how we calculate scores here.

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82 / 100 based on 9 expert reviews

  • 88 / 100 | Runner's World | Level 5 expert

    Even with the extra cushioning, the AllOut Fuse's ride is firm but remains soft enough for short jogs from your front door to the trailhead.

  • 86 / 100 | Believe in the Run | | Level 5 expert

    I would recommend these shoes for short to medium runs on the pavement or packed trails.

  • 85 / 100 | Believe in the Run | | Level 5 expert

    I would recommend this shoe to a runner looking for an extremely durable shoe that can handle roads and packed trails.

  • 83 / 100 | Runner's World | | Level 5 expert

    Merrell's All Out Fuse was a hit with those who enjoyed its minimalist pedigree, providing flexibility and low-profile agility, yet with a bit more underfoot and a larger heel-toe drop than the company's Glove models.

  • 75 / 100 | The Ginger Runner | | Level 5 expert

    While I can see this shoe being good for form work and gait analysis on softer ground (grass, dirt, etc) or roads, I don’t see the shoe working for longer hauls or trail running.

  • 83 / 100 | Running Competitor | Level 4 expert

    The ride is somewhat basic and very natural (but not bone-jarring or raw), offering up an infinitely agile sensation in every stride.

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  • Merrell completes its cast of trail shoes by unveiling a road to trail hybrid in the All Out Fuse. Instead of its usually moderate to super aggressive outsole, Merrell uses fairly regular rubber pattern that relies mainly on a “grippy” rubber compound for versatile and do-it all traction.
  • Speaking of versatility, this minimalist shoe brings enough cushioning to the party to make it as a viable option for mid-distance training sessions. The All Out Fuse is also a solid alternative for those who are looking for a taste of the barefoot experience without totally giving away much-needed support and protection.
  • Merrell incorporates a slightly stiff sole that will delight most speedsters, but gives that hint of plush cushioning for a lightweight shoe to lessen the impact of landings and to offer those who are looking for a transition shoe more underfoot protection on the road or trail.

The fit of this Merrell trail shoe is average throughout from the heel to the forefoot. It includes a toe box that has ample room for the toes to splay and to accommodate runners whose feet are a bit wider than usual. Medium is the offered width of the All Out Fuse. The sizing runs true and is sold in sizes 5 to 15 for the men’ and 4 to 11 for the women’s.

The lug pattern on the outsole is not as aggressive as those designed purely for the outdoors. Micro lugs are featured on the outsole for more consistent and versatile grip on the road or trail. Instead of the Vibram outsole that is used in other All Out models, Merrell uses its own M Select Grip in order to have more traction and durability.

The low to the ground feel with decent underfoot ground feedback is made possible by the UniFly midsole. It is made of high-grade EVA, which is why it has more than average durability and cushioning. The cushioning provided by this foam is quite plush despite not adding much to the shoe’s weight. Merrell utilized this foam also because it effectively disperses shock.

An incredibly breathable and abrasion-resistant AirMesh covers a large part of the upper. Giving support and structure to this fairly minimalist upper is the TPU overlays. Merrell’s Omni-Fit Lacing System is a unique pattern of the eyelets and the laces that deliver a lockdown feel and personalized comfort. Inside the shoe is a 2mm insole for a more foot-hugging fit and plush comfort.