• 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: 7.7oz
    Women: 7.7oz
  • 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.

  • Width
    Men: normal
    Women: normal
  • Release date
Show more facts


We spent 9.1 hours reading reviews from experts and users. In summary, this is what runners think:

4 reasons to buy

  • The upper of the Under Armour Micro G Optimum features a breathable mesh material, as well as a synthetic toecap detail for added protection.
  • The semi-bootie tongue structure and the 4D foam foot bed eliminates slippage.
  • The outsole of the Micro G Optimum features a high abrasion EVA, which promotes a smooth ride and better transitions.
  • Most runners were impressed by how comfortable the Micro G Optimum was for them.

2 reasons not to buy

  • Many runners were disappointed with the durability of the Under Armour Micro G Optimum.
  • This shoe runs larger than the standard size.

Bottom line

The Under Armour Micro G Optimum is a neutral trail running shoe that offers impressive comfort. It promotes a smoother ride and better transitions through the gait cycle, though the overall durability feature of the shoe did not impress as much.


Updates to Under Armour Micro G Optimum

  • The Under Armour Micro G Optimum features the full-length Micro G foam that gives enough amount of cushioning. It gives underfoot protection while running and it gives efficient energy return for a resilient ride.
  • The shoe comes with an enhanced outer sole. The high abrasion EVA gives great ground contact for a smoother ride and this foam also gives less tread for added ground contact. It also gives added durability on high wear areas.
  • It also features the molded 4D foam that mimics the natural shape of the foot. It is designed to eliminate slippage for an enhanced running performance.

Under Armour Micro G Optimum size and fit

The Micro G Optimum is in standard running shoe size. It can accommodate a wide range of foot measurements. The heel and midfoot fits well, snug and comfortable. The forefoot is roomy enough for toe splay. The sole adapts to the foot’s natural shape, giving a comfortable fit. Under Armour is offering this shoe in standard running shoe width.


The outsole of the shoe features the high abrasion EVA that is extended in the entire unit. It delivers great ground contract for an enhanced running experience. It also absorbs impact on landing. The blown rubber in the outsole also gives durability. The outsole of the shoe delivers reliable amount of traction and durability.


The Micro G Optimum features the Micro G foam that is placed in the entire midsole unit. The foam delivers right amount of protection and bounce for a more responsive ride. The molded 4D foam footbed follows the shape of the foot. This gives adaptive fit and eliminates slippage especially on uphill runs and downhill plunges.


The upper of the Under Armour Micro G Optimum features a comfortable and breathable coverage through the textured mesh that also wraps the foot securely. The breathable mesh keeps the foot well ventilated. The integrated midfoot structure also wraps the foot securely and hugs it in place. The external heel counter also gives help in locking down the heel in place.