Updates to Under Armour SpeedForm Slingshot 2

  • The Under Armour SpeedForm Slingshot 2 has been modified from the upper to the outer sole. In the upper is the new Threadborne™ knit material that offers breathability. It is also flexible enough to adapt to the natural shape of the foot.
  • For this 2nd iteration, Under Armour gives up the Micro G® foam, but retains the Charged Cushioning®. Instead of the Micro G® foam, a lightweight EVA foam has been used.
  • The SpeedForm Slingshot 2 now has a translucent outsole with high-abrasion resistant rubber which continues to provide runners the much-needed traction, durability, and flexibility.

Size and fit

The Under Armour SpeedForm Slingshot 2 feels true to size. The knit upper and burrito tongue provides enhanced fit without compromising comfort. It has a medium fit in the heel and forefoot area, and the toe box is spacious enough for the toes to move without any restrictions. Both the men’s and women’s version of the shoe are available in medium width.


The Slingshot 2 features a translucent outsole with high-abrasion rubber for durability. The outsole is designed to deliver a good amount of traction for a wide variety of paved surfaces. The outer sole is also made to give added flexibility.


In the midsole is the Charged Cushioning, which is known for its flexibility and responsiveness. Along with it is the EVA midsole foam which is very lightweight and soft as well. The combination of the two materials provides runners better performance on the road. Both the Charged Cushioning and the EVA foam offer long-lasting underfoot protection.

A TPU plate is also placed in the midsole for a quicker toe-off and smoother heel-to-toe transition.


Featured in the upper of the Under Armour SpeedForm Slingshot 2 is the Threadborne™ knit material which is specifically designed to provide better foot wrap without compromising breathability. The knit upper is stretchable and adapts to the shape of the foot for comfortable coverage. There are also enough perforations on the toe box and tongue for enhanced breathability.

The shoe has a sock-like "burrito tongue" which is designed to provide the foot a closer fit. It also comes with an adjustable wide-set lacing system the further secures the foot comfortably.

Lastly, the SpeedForm Slingshot 2 has an external heel counter, which offers better foot lock down all throughout the run.


The current trend of Under Armour SpeedForm Slingshot 2.
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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.