• 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: 8.7oz
    Women: 8.7oz
  • Heel to toe drop
    Men: 8mm
    Women: 8mm

    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: 25mm
    Women: 25mm
  • Forefoot height
    Men: 17mm
    Women: 17mm
  • Width
    Men: normal
    Women: normal
  • Release date
Show more facts


We spent 8.9 hours reading reviews from experts and users. In summary, this is what runners think:

6 reasons to buy

  • The upper unit is made of a flat mesh that’s durable and breathable.
  • Most reviewers appreciated the inclusion of some welded overlays to improve the snug coverage.
  • The perforated tongue adds ventilation and upward comfort to the skin.
  • The injected Micro G foam offers well-cushioned landings and easier lift offs because of a responsive nature, according to some runners.
  • The insole of the Micro G Nitrous is a unit that is capable of conforming to the natural shape of the foot.
  • Blown rubber offers a durable and protective layer for the outer section of the Micro G Nitrous.

3 reasons not to buy

  • Some runners felt pain in their arches as they ran, thus owing the need for better arch support.
  • There were also issues when it comes to its durability because there were testers who started to notice signs of wear after a few months of use.
  • Others thought that it was too narrow for their feet.

Bottom line

The Micro G Nitrous from Under Armour is a reliable running shoe for many because it’s durable and dependable in many respects. It’s a neutral shoe that anyone can use for their daily activities.


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.

Are you an expert? Apply to contribute here.

60 / 100 based on 1 expert reviews

  • 60 / 100 | Texaz Mane

    I love Under Armour shoes, but for running, this ain't it.

Apply to become an expert

Updates to Under Armour Micro G Nitrous

  • The Under Armour Micro G Nitrous features the durable flat mesh that delivers a breathable upper coverage. It is really designed to give endurance to the upper of the shoe without adding weight.
  • The outsole of the shoe was also enhanced. Aside from the standard blown rubber that gives durability to high wear areas, it also features the anatomical flex grooves. The grooves promote natural foot flex for a maximum and smoother heel-to-toe transition.

Under Armour Micro G Nitrous size and fit

The Micro G Nitrous shoe is in standard running shoe length and width. Men and women would be able to get the right fit and right size on this shoe. The heel and midfoot offers a snug fit and the forefoot has enough space for foot movement. Runners would find a comfortable fit on this shoe.


The outer sole of the Micro G Nitrous features a blown rubber that is very durable. It gives endurance to the shoe’s high wear areas. The flex grooves are also strategically located in the outsole. This anatomical flex grooves allow natural flex of the foot for an enhanced running experience.


The injected Micro G foam in the midsole gives reliable underfoot protection without adding weight to the shoe’s overall construction. It is a thin layer foam that gives support and cushioning. With this foam, landings are well-protected and runners can experience a responsive ride. It also comes with a molded 4D foam footbed that mimics the foot’s natural shape and reduce slippage. It also gives added comfort and underfoot protection.


The upper of the Under Armour Micro G Nitrous is made up of durable flat mesh that delivers a breathable coverage. It is lightweight and durable enough to withstand the elements on the road or trail. This flat mesh keeps foot well-ventilated throughout the run. The welded overlays also give added support and enhanced fit. The perforated tongue also gives added comfort and breathability.