Under Armour SpeedForm Slingshot

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Under Armour SpeedForm Slingshot Review Facts

Under Armour‘s footwear team challenged themselves to defy the limits of speed, and they came up with the SpeedForm Slingshot. The upper uses a woven material in asymmetrical compression zones in order to increase power and speed. It also uses Dyneema, “the world’s strongest fiber,” for flexible durability. In the midsole, the Pebax propulsion plate creates explosive launches. The result? A shoe that mimics muscle compression, springs the foot forward like a slingshot and makes fast runners even faster.

Editor's Pros & Cons
Pros
  • "Burrito tongue" wraps the foot and creates a precise, customized, sock-like fit
  • Many reviewers stated the shoe is very comfortable to wear
  • Midsole design provides great responsiveness
  • No break-in period; feels great out of the box
  • Very light; great for speed and performance
  • Popular design and color choices
Cons
  • No wide sizes
  • Sizes run small; potential buyers should consider ordering a half or full size up
  • Some testers reported a lack of support for side to side movements or long races
  • Some reviewers found that the knitted upper material in the toe region wears out quickly
See How
Reviews were analyzed here:
We read, analyze and sort reviews into positive & negative categories to give you the complete picture.
What are buyers saying?

We have spent 2.5 hours analyzing a total of 245 reviews.

These reviews are then categoried into "Positive" and "Negative" feedback.

Below you will read a summary of them:

Positive
  • Under Armour SpeedForm Slingshots get a lot of praise from buyers for the comfortable fit. The overall design of the upper creates a glove-like fit that holds the foot with a natural feel.
  • Most buyers say these shoes are a comfortable choice for running, walking, training, or long days on your feet at work.
  • The look and style get a lot of compliments, too. Aside from a few people who were not pleased with the color options or design, buyers generally say the look of the shoe is what first drew them to try them out.
  • Overall, these shoes are lightweight without any extra bulk.
  • The upper has a simple design without any extra seams or stitching that can create hot spots.
  • Around the middle of the foot, the snug design keeps the foot in place.
  • Positive reviews of the SpeedForm Slingshot come from both runners and walkers.
  • The woven material of the upper is breathable.
  • There are several reports of people who machine washed these shoes without any issue.
  • A few reviewers with neuropathy say these shoes keep their feet feeling comfortable and pain free.
  • The minimalist design gives this shoe a barefoot feel but with a less extreme low drop.
  • Compared to some other materials, the woven upper can hide a bit of dirt so they can stay looking cleaner longer.
  • Most reviewers say they needed no break in time.
  • These shoes are on the more expensive end for runners, but many buyers claim that they are worth the cost.
Negative
  • The most common complaint is sizing. Most buyers say this design runs small. Checking sizing charts or trying on a pair before buying will save you a lot of hassle and possible pain.
  • The tongue design is unique. For some people, it's an improvement from traditional shoe tongue designs. For others, it seems useless or distracting.
  • UA products can be pricey. The SpeedForm Slingshot is no exception.
  • There are a few reviews from people who claim there isn't adequate heel and ankle support in this design.
  • If you like runners with plentiful sole cushion, this is not the shoe for you. The minimal cushioning has led to sore feet for some people.
  • Several buyers have issues with the laces coming untied or loose easily while running.
  • There are some reports of excessive wear on the upper, especially in the toe area, after just a few weeks.
Reviewmeter
The Reviewmeter shows you an overall score that you can easily refer to. The highest rating is 10 (100% positive feedback)
Of the 245 reviews we found in total, 12% were negative, and 88% were positive.
8.8
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Outsole
Outsole

Outsole

The SpeedForm Slingshot's outsole is made of rubber and was designed for traction and durability. It uses two colors and has grooves for flexibility and treads for grip, which makes it ideal for road running. Its anatomical design gives a natural fit and greater responsiveness for better performance. It is thick enough to be durable, but also thinner than some other shoes because it was designed to be as light as possible for speed.
Midsole
Midsole

Midsole

The midsole is made from two pieces of foam separated by a y-shaped plastic plate. The bottom layer is the Micro G foam, designed to be light, bouncy, and strong in order to provide great responsiveness and shock absorption. It is about 30% thinner than other foams, resulting in a lighter weight and the foot is closer to the ground. The TPU Pebax propulsion plate adds support and stability. The top layer is Charged Cushioning, which makes adds comfortable cushioning for soft landings.
Upper
Upper

Upper

The SpeedForm Slingshot upper uses a 3D knit woven with the super strong fabric Dyneema to wrap the forefoot area. The burrito wrap tongue gives a precise, comfortable, sock-like fit. There are three different zones of compression: the tight and springy lateral, tightest compression on the medial arch area, and a loose compression on the forefoot. This allows the toes to move around while maintaining a snug fit around the foot. The heel cup stabilizes the foot, the woven pattern allows the foot to breathe, and the overall design acts like a slingshot, maximizing speed and responsiveness.
Weight
Weight

Weight

The SpeedForm Slingshot men's shoe weighs 7.5 oz and the women's shoe weighs 6.2 ounces. At less than half a pound, these shoes are very light compared to other running shoes. The outsole's rubber placement was designed to make the shoe lighter. The midsole weighs about half of what traditional midsoles weigh. The woven upper was also designed to be sturdy yet lightweight. SpeedForm technology and compression work together to make the shoe as light as possible without compromising on quality, fit or comfort. Most reviewers really liked the light weight, saying it made running easier, but a few thought the shoe was too light to be stable enough for long runs.
Breathability
Breathability

Breathability

The upper provides the breathability of the SpeedForm Slingshot. It uses a woven pattern in order to let air in and allow the foot to breathe. The seamless asymmetrical zoning compression reduces the risk of hot spots and blisters. Reviewers had mixed opinions on breathability. Some of them felt that the shoe offered a good amount of breathability for everyday runs, while others stated that the shoe was not as breathable as they would have liked it to be, especially in hot weather, potentially resulting in problems such as overheating or blisters. The Dyneema fabric makes the upper stronger, but it seems to not be quite as breathable as other materials.
Comfort
Comfort

Comfort

Every layer adds comfort to the SpeedForm Slingshot. The outsole uses an anatomical design for a natural fit. The midsole uses Charged Cushioning for soft landings and Micro G foam to make the shoe lighter and more responsive. The upper uses a burrito tongue for a sock-like fit that hugs the foot, as well as seamless asymmetrical zonal compression to reduce the risk of blisters and hot spots. The tongue is also padded for increased comfort and fit. The shoe's overall low weight also makes the shoe more comfortable because it allows lots of movement is not bulky to carry when running. The only non-comfortable trait was that the upper wasn't as breathable as some testers would have liked, resulting in hot spots. Many reviewers complimented how comfortable the shoe is, with several purchasing multiple pairs in different colors.
Style
Style

Style

The slick style of the shoe was very popular with reviewers. Men have nine color choices: black/aluminum, steel/white/black, rocket red/white/black, flashlight/black, green, hyper green, systematic/cardinal, blue, and meridian blue. Women have five choices available to them: limelight/Tahitian teal/peacock, London orange/sirens coal, pink chrome, crystal, and steel. The colors are so well-liked that many reviewers stated they ordered pairs in multiple colors, and some even requested more colors so that they could purchase more shoes!
Durability
Durability

Durability

The footwear team at Under Armour designed the shoe to be durable at all three levels. The rubber in the outsole has enough thickness to last for many miles without the treads wearing down. The Micro G foam in the midsole was designed for strength in addition to being light and bouncy. The upper uses Dyneema, “the world's strongest fiber,” in the forefoot, which makes the shoe both durable and flexible. However, while most reviewers had no problems at all, some reviewers noticed wearing in the area around the toes within a few weeks.
Protection
Protection

Protection

The SpeedForm Slingshot offers a nice level of protection. The outsole protects runners from feeling the roughness of the ground. The Micro G foam in the midsole absorbs shock. The woven knit material and Dyneema in the upper protect the shoe and foot against the elements. Many reviewers reported great protection with the SpeedForm Slingshot. Some runners who normally have knee pain, shin splints, cramping, ankle rubbing, and other problems did not experience those problems with this shoe.
Responsiveness
Responsiveness

Responsiveness

Responsiveness also comes from all three layers of the shoe. The outsole's flexible treads allow users to run comfortably on roads, and the anatomical fit improves performance. The midsole uses Micro G foam for explosive takeoffs and Charged Cushioning for smooth landings. The Pebax propulsion plate between those layers acts as a launching pad, supporting and stabilizing the takeoffs and landings. The upper uses seamless asymmetric zonal compression around the foot and flexible material to act as a slingshot, making movement faster and easier. The low weight also makes the shoe easier to move in, and the low drop allows the foot to move more naturally. The Under Armour footwear team specifically designed the shoe to make fast runners faster, which means excellent responsiveness.
Support
Support

Support

Although the SpeedForm Slingshot is light, it still gives plenty of support to runners. The outsole lifts the foot off the ground. The midsole uses a supportive Micro G foam under a Pebax propulsion plate to support and stabilize the foot. The upper has a heel cup to keep the heel in place and uses a “burrito tongue” construction for a sock-like fit. The upper also uses three levels of compression: tightest compression on the medial arch area, the tight and springy lateral, and loose compression on the forefoot. This supports the ankle and lateral areas of the foot while allowing the toes to move for takeoffs. The level of arch support was rated as neutral, meaning good for many runners, but runners who require additional support may need to use an arch support or insole. Being a neutral shoe, it also was not designed for over-pronators. Many testers found the shoe to be supportive, although some thought the upper was too flexible for side to side movements.
Terrain
Terrain

Terrain

The outsole has flexible rubber grooves and treads, which make the SpeedForm Slingshot ideal for running on roads. It does not have lugs to grip uneven ground or spikes to grip the slippery ground, so it is not recommended for use on trails or wet or slippery terrain. Because of its light weight, some sites categorize the SpeedForm Slingshot under competition, for things such as short races around tracks, although some reviewers commented that the shoe lacks the required stability for long races. Many testers stated that the shoe was fast and reliable for their daily road runs.
Price
Price

Price

The Under Armour SpeedForm Slingshot is slightly expensive for a road running shoe. However, it is extremely light and uses great technology that really springs the foot forward like a slingshot, so many runners will not mind paying a little extra. Some sites are offering a discount because the shoe has been out for a while; runners looking to purchase this shoe may be able to get a discount on certain sizes and colors.
Traction
Traction

Traction

The Under Armour SpeedForm Slingshot uses a durable, flexible placed rubber with grooves and treads, which give good traction on roads. It is light and the technology makes the shoe thin yet durable, keeping the foot closer to the ground for better traction and control. The shoe does not have lugs or spikes, so it does not have proper traction to run on rough terrain or on slippery ice or snow.
Flexibility
Flexibility

Flexibility

The SpeedForm Slingshot is flexible on all levels, allowing users to move freely and quickly. The flexible outsole gives good traction on roads. The midsole cushioning and foam spring the foot forward during takeoffs and give soft, shock-absorbing landings. The 3D knit material in the upper uses woven in Dyneema, designed to be durable enough to last for many runs, yet flexible enough to allow the foot to push off the ground quickly and easily, achieving their goal of making runners faster.
Stability
Stability

Stability

Stability also comes from all levels of the shoe. The outsole rubber lifts the foot off the ground, using an anatomical design for a natural fit that holds the foot in place. The Pebax propulsion plate in the midsole supports and stabilizes the foot during takeoffs and landings. The upper uses a burrito tongue to wrap and guide the foot, and asymmetric zonal compression to give the most stability to arches, then to the lateral, and then loose compression around the toes to allow them to move enough to spring during takeoffs. The laces and heel cup also stabilize the foot, although a few testers experienced some heel slippage. Many testers liked the stability level of the shoe, while others thought it did not offer enough stability for side to side movements, long races, or over-pronators.
Drop
Drop

Drop

The SpeedForm Slingshot has a heel height of 22.5 mm and a forefoot height of 14.5 mm, creating a drop of 8 mm, which is 4 mm less than the standard 12 mm drop. This distributes the cushioning more evenly rather than emphasizing the heel and allows more natural foot and running movements. In some runners, a lower drop reduces the level of knee pain and encourages runners to run on their forefoot.
Key Features
Key Features

Key Features

  • UA SpeedForm technology delivers light weight, distraction-free running

  • Outsole uses placed rubber for great traction with less weight

  • Anatomical outsole provides a customized fit

  • Midsole uses Charged Cushioning for cushioned support and Micro G foam for responsiveness

  • Pebax propulsion plate, in between the Charged Cushioning and Micro G foam, adds support and stability

  • Seamless asymmetric zonal compression stabilizes the arch and lateral areas and acts as a spring, resulting in faster speed

  • 3D knit upper uses the world's strongest fiber, Dyneema, for durability and flexibility

  • "Burrito tongue" wraps the foot giving a precise, sock-like fit
Bottom Line
Bottom Line

Bottom Line

Overall, the Under Armour SpeedForm Slingshot is a great road running shoe. Its light weight allows users to carry the shoe quickly and easily, and to maintain their energy while doing so. The attractive style and colors appeal to many people. Its upper fits lock a sock, the midsole uses comfortable cushioning, and the outsole has an anatomical sole giving a natural fit and better performance. The shoe is also incredibly responsive, with the midsole giving great takeoffs and landings and the upper acting like a slingshot, making runners quicker than ever before. Possible areas for improvement include a lower price, more stability in the heel to eliminate slippage, more stability and support in the upper for lateral moves and over-pronators, a more durable upper material around the toes, and bigger or wider sizes. In short, the Under Armour footwear team succeeded in their challenge to defy the limits of speed and created a light, fast road running shoe.