• 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: 7.9oz
    Women: 5.3oz
  • Heel to toe drop
    Men: 0mm
    Women: 0mm

    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: 30mm
    Women: 30mm
  • Forefoot height
    Men: 30mm
    Women: 30mm
  • Width
    Men: Normal
    Women: Normal
  • Release date
    Mar 2018
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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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92 / 100 based on 7 expert reviews

  • 85 / 100 | The Ginger Runner

    It's a fun shoe. I've had a lot of joy running in it.

  • 90 / 100 | Run Moore

    Great shoe for you to come in and try.

  • 99 / 100 | Road Trail Run

    My only complaint is the low relatively unstructured heel collar leading to less than ideal heel hold. A bit more height, structure, and collar padding would perfect the Duo for me.

  • 99 / 100 | Road Trail Run

    It is light and responsive enough that one could conceivably use it for the bulk of their runs as a daily trainer, save for the really fast stuff. I think the main upsell for this shoe vs others would be the roomy fit and the amazing breathability of the upper.

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  • The Altra Duo brings together a balance of maximum-level cushioning and lightweight wear in a zero-drop silhouette. With such a combination, the shoe promises an enhanced speed and a prolonged running power while enabling natural motion. It is ideal for road racing and up-tempo runs.
  • A thin mesh presents itself as the upper of the Duo. It wraps the foot comfortably and enables optimal breathability for a well-ventilated run. There are thermoplastic polyurethane (TPU) overlays that support the mesh for a secure fit and maintain the shoe’s structural integrity.
  • The midsole uses Max-LT, Altra’s special foam compound that offers an exceptional level of cushioning and energy return. It has an anatomical layout to promote comfort and correct foot movement. Meanwhile, the outsole has a decoupled design, giving the shoe a flexible quality and letting it adjust according to the foot’s motions.

The Altra Duo runs big; runners are recommended to go a half-size down their usual wear. The forefoot has a unique feature that allows the shoe to cater to any foot volume. Meanwhile, the midfoot and rearfoot areas are snug to provide security. The Altra Duo is available in regular width for both the men’s and women’s versions.

The blown rubber outsole of this road shoe focuses on the high-wear areas. The forefoot and heel have twice as much rubber to make them durable, but not at the expense of weight.

It also features a decoupled design, which means that underfoot flexibility is enhanced. This is because the shock is distributed evenly, in contrast to the conventional one-piece outsole where impact tends to concentrate on only one area.

The Max-LT is a new midsole compound from Altra that is present in the Duo. Made from injection-molded foam, the Max-LT creates an extensive underfoot cushioning, but not at the expense of weight – a feature that will appeal to marathon runners and long-distance trainers.

With a zero-drop structure, the platform of the Altra Duo places the heel and forefoot on the same height, permitting a natural position and alignment that results in a low-impact landing.

The Inner Flex technology is also present, which means there are flex grooves across the length of the shoe. The grooves equip the foot with enhanced functionality while also encouraging a natural stride.

The upper of the Altra Duo consists of a reinforced mesh that is razor-thin. The thinness of the material makes the shoe twice as much breathable compared to regular mesh uppers, as it ensures excellent airflow even during hot and humid conditions. However, while it may look flimsy, it is durable enough to handle the runner’s fastest pace.

A Dri-Lex® fabric liner wraps the inside of the upper, giving a sensation that is almost like a second skin. Aside from supplying comfort, it also keeps the foot dry as its unique fibers wick away moisture.

Few thermoplastic polyurethane (TPU) overlays surround the upper, keeping the layout simple while still delivering the necessary support especially at the midfoot. The minimal design maintains the breathability of the mesh upper, as there are fewer restrictions on it.

The toe box of the Duo, same as the Olympus 3.0, is Altra’s proprietary design, called the FootShape™. Its structure lets the toes spread out naturally, yielding stability and balance. Because the foot now has an increased capability of remaining steady, running power is improved.

The shoe’s heel collar has a deepened structure, allowing the Achilles to fit precisely and snugly, thus ensuring a locked-down feel.