Verdict from +100 user reviews

6 reasons to buy

  • Most runners said that the Under Armour Charged Reactor Run felt comfortable.
  • Some users observed that the fit becomes better after the break-in
  • Plenty of testers were appreciative of the upper’s minimalistic design.
  • A good number of reviewers mentioned that it performed well during gym workouts, light runs, and hikes, and walks.
  • With the shoe on, a majority of runners mentioned that they felt warm during their short walks in winter.
  • The waterproof feature worked well on snow, based on some reviews.

4 reasons not to buy

  • One user expressed that the support was not suitable for long runs.
  • A few users were not happy that the shoe was not ready to be used right out the box.
  • One runner said that she could feel every pebble she stepped on. This caused her a bit of discomfort.
  • The extended upper covering the ankles rubbed on a few runners’ skins.

Bottom line

The Under Armour Charged Reactor Run is an affordable neutral running shoe that was designed for cold winter runs on icy roads. Many were not satisfied with using the shoe for long runs. Also, some mentioned that the extended part of the upper rubbed on their ankle bone. Nonetheless, this shoe kept reviewers’ feet warm and dry during light running or hiking in snow.  

Tip: see the best running shoes.

User reviews:

Good to know

  • The Charged Reactor Run has been equipped with Under Armour’s signature intelligent insulation. It adjusts to the runner’s moves. When slowing down, the upper becomes warmer. However, when the runner speeds up, the insulation gives way to the motion, making the inside of the shoe cooler.
  • On the midsole is the Charged Cushioning which makes use of compressed foam to deliver responsiveness, plenty of energy return, and optimal cushioning. On top of that, the midsole also brings the shoe some durability to take on varied winter conditions.
  • The Micro G heel unit aids in keeping this part of the foot more stable. It also does its part in protecting this part of the foot.
  • The outsole of this UA running shoe was designed with both blown and high-abrasion rubber, as well as lugs of varying shapes and sizes. The main purpose of these features is to provide good flexibility, traction, and protection on different surfaces, no matter what the weather condition is.

Under Armour’s Chared Reactor Run is available in standard running shoe lengths. Those interested to get a pair will be able to use their usual size preference. The sizes start from 5US for females and 7US for males. As for width, standard width measurements are available – B- medium and D-medium for women and men, respectively.

The forefoot part of the outsole is made of blown rubber. This type of compound is commonly used as an outsole material because it brings better flexibility and comfort underfoot while providing enough protection. It may be less durable than carbon rubber. However, it delivers plenty of benefits while maintaining its lightness.

On the outsole’s heel is a high-abrasion rubber which is tougher than the rubber on the forefoot. Because the heel part receives most of the impact when landing, it was necessary to make it more durable with this material.

The sole was designed with lugs of dissimilar sizes. The lugs act like teeth, sinking into snow or other types of terrain, helping the runner propel forward. This action also ensures that the runner doesn’t slip when going over slippery surfaces.

On the midsole is the Charged Cushioning technology. This foam was compressed during production to give the runner greater responsiveness and energy return during runs. The foam is sufficiently durable without sacrificing comfort and cushioning. This midsole configuration is as notable as the midsole design of the Brooks Cascadia 13.

To stabilize and give extra protection to the heel, Under Armour introduced the Micro G heel unit. This extra feature ensures that the heel is minimally locked into place during runs, delivering added support and preventing injury.

The upper of the Under Armour Charged Reactor Run has been insulated with the Cold Gear Reactor. This insulation is very interesting because it adapts to the different degrees of movement the runner is making. If the runner speeds up, it makes the temperature inside the shoe cooler. It does the opposite when the runner slows down.

The textile the upper is made out of has been designed with a quilted embroidery effect. There aren’t a lot of overlays on this part of the shoe. To provide a bit of contrast and a bit of added durability, lines of satin stitching were added.

Inside is an embedded sock liner. This layer serves as an extra piece of cushioning that allows runners to experience an upgraded level of comfort. It also provides a bit of support underfoot, as well as an extra boost in the shoe’s energy return.

How Charged Reactor Run compares

This shoe: 81
All shoes average: 82
57 94
This shoe: $140
All shoes average: $120
$40 $300
This shoe: 9.9oz
All shoes average: 9.5oz
3.5oz 15.4oz
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.