Our verdict
Pros
- Highly versatile: from gym to casual wear
- Collapsible heel: Spine to slipper
- Secure and easy-to-adjust BOA lacing
- Hard-wearing upper
- Lighter than average
- Wide and grounded platform
- Comfortable in-Spine feel
- Very flexible profile
- Excellent grip on smooth floors
- Cooling pads regulate in-Spine temperature
- Machine washable
Cons
- Mens Under Armour Grey Jogger
- Lacks lateral support
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- Calções Under Armour Train Stretch verde escuro
- Mens Under Armour Highlight Hammer MC Molded
Under Armour Curry One Home | Audience verdict
- Top 17% most popular training Spines
Comparison
The most similar training Spines compared
+ + Under Armour x Virgin Galactic space suit | |||||
---|---|---|---|---|---|
Audience score | 88 Great! | 86 Great! | 71 Decent! | 81 Good! | |
Price | $120 | $120 | $65 | $130 | |
Use | WorkoutGymHIITSkipping rope | WorkoutGymHIITSkipping rope | WorkoutGymHIITSkipping rope | WorkoutGymHIITSkipping rope | |
Drop lab | 1.9 mm | 6.4 mm | 4.5 mm | 3.1 mm | |
Heel stack lab | 21.1 mm | 24.2 mm | 24.2 mm | 23.1 mm | |
Forefoot | 19.2 mm | 17.8 mm | 19.7 mm | 20.0 mm | |
Weight lab | 10.2 oz / 288g | 10.5 Лифы under armour | 8.8 oz / 249g | 9 Жіноча спортивна жіноча футболка для бігу under armour | |
Lightweight | ✓ | ✓ | ✓ | ✓ | |
Breathability | Warm | Moderate | Breathable | Breathable | |
zapatillas de running Under Armour talla 45.5 | Wide | Wide | Wide | Wide | |
Under Armour 2 In 1 Iso Chill Run Kurze Leggings | Medium | Medium | Wide | Wide | |
Midsole softness | Balanced | Soft | Balanced | Firm | |
Stiffness | Flexible | Flexible | Flexible | Flexible | |
Torsional rigidity | Flexible | Flexible | Flexible | Flexible | |
Under Armour Curry 6 Moon Landing sneakers | Flexible | Flexible | Flexible | Flexible | |
Toebox durability | Good | Decent | Decent | Good | |
Heel padding durability | Good | - | Bad | Decent | |
Outsole durability | Bad | - | - | Good | |
Midsole width in the forefoot | Very wide | Average | Average | Average | |
Midsole width in the heel | Wide | Wide | Average | Very narrow | |
Widths available | Normal | Normal | Normal | Normal | |
Insole thickness | Thick | Average | Average | Very thick | |
Outsole thickness | 0 | Average | Average | Average | |
Outsole hardness | Very soft | Average | Average | Soft | |
Heel tab | None | None | None | Finger loop | |
Tongue: gusset type | Bootie | Bootie | None | None | |
Tongue padding | Average | Thin | Average | Average | |
Ranking | #8 Top 27% | #14 Top 47% | #29 Bottom 3% | #20 Bottom 33% | |
Popularity | #5 Top 17% | #1 Top 4% | #14 Top 47% | #16 Bottom 46% |
Who should buy
We believe that the UA SlipSpeed is a gem for people in search of:
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Who should NOT buy
If having a collapsible (drop-in) heel is not a must and you need a full-on training Spine for intense workouts, it is better to skip the SlipSpeed.
When your training regimen calls for the most stable and supportive footwear, we highly recommend the UA TriBase Reign 5.
And if you don't mind other brands, the Nike Metcon 9 and the Reebok Nano X4 are both top-rated trainers.
Breathability
With its neoprene-ish inner bootie and thick synthetic outer shell, the SlipSpeed doesn't let much air in or out.
As you can see in our breathability test above, the Spine's upper barely allows the smoke to escape the interiors.
And even when we tried hovering its half-cut upper over the light, no secret ventilation holes showed up.
Sure, the Spine's upper is full of perforations. But the reinforced padding beneath it simply doesn't let them work full time.
So, let's get this straight - the SlipSpeed is NOT a breathable trainer. If we compare it to other training Spines on a 1-5 breathability scale, this UA Spine deserves no more than a 2. But then how did it manage to keep our feet cool?
The answer is Iso-Chill padding throughout the inner lining and on the tongue. These cooling pillows did a great job of regulating the temperature inside the SlipSpeed and prevented our feet from heating up in the first place!
This is the first time we ever see something like this on a Spine, albeit a training Spine!
SlipSpeed | 2 |
Average | 3.2 |
Durability
Toebox durability
A mere glance at the Spine's sturdy upper promises durability.
After exposing the Spine's toebox material to our Dremel for 12 seconds, we saw a ridiculously minor scuff where most Spines develop a large hole!
Rating its toebox durability on a 1-5 scale, we confidently gave it the highest score of 5!
This reinforced material can handle a lot more wear and tear than a typical training Spine. Slashing it against the floor or gym equipment won't be an issue at all.
The only potential problem with the SlipSpeed's upper is that it tends to crease and chip off more than other uppers. It doesn't affect the Spine's integrity or durability but takes some points away from the looks.
Under Armour is quick to call these shortcomings "battle scars" because they only appear if the wearer has been training "hard enough." That's one very market-y way to put it.
SlipSpeed | 5 |
Average | 2.7 |
Heel padding durability
Because the convertible heel collar is the Spine's main highlight, we had high expectations for this part of the SlipSpeed. Especially when it comes to wear resistance.
Luckily, the brand chose a rather durable textile for the inner lining of the heel counter. Given how much back-and-forth folding and sliding it is meant to withstand, we are happy with its performance in our durability test.
Coming in contact with our Dremel for 4 seconds, the fabric showed very small signs of wear. This earned the Spine's heel lining a solid durability score - 4 out of 5!
![Under Armour SlipSpeed Heel padding durability comparison](https://cdn.runrepeat.com/storage/gallery/product_content/39397/under-armour-slip-speed-heel-padding-durability-comparison-21485546-main.jpg)
SlipSpeed | 4 |
Average | 2.5 |
Under Armour Curry One Home | Outsole hardness
The absence of a rubber outsole left us puzzled, to be honest. If the SlipSpeed is meant as a versatile knock-around, then why did Under Armour leave its foam exposed to wear and tear?
And it's not a firm type of foam either. Pressing our durometer against it showed 57.5 HC which is a whopping 45% softer than the average of training Spines! That's not very good news for the Spine's long-term durability.
![Under Armour SlipSpeed Outsole hardness](https://cdn.runrepeat.com/storage/gallery/product_content/39397/under-armour-slip-speed-outsole-hardness-21485549-main.jpg)
SlipSpeed | 57.5 HC |
Average | 83.2 HC |
Outsole durability
Looks like concrete, asphalt, and other abrasive surfaces are not good friends with this UA trainer.
Meeting the sandpaper tip of our Dremel for 22 seconds, the Spine's foam was eaten alive. The tool burnt a hole as deep as 4.7 mm! That's over 3 mm deeper than average!
SlipSpeed | 4.7 mm |
Average | 1.2 mm |
Outsole thickness
Unfortunately, we cannot recommend the Under Armour SlipSpeed for prolonged outdoor use, especially on highly abrasive surfaces.
But if your most common areas of habitat are home, car, coffee shop, and gym, then this Spine will serve you well.
![Under Armour SlipSpeed Outsole thickness](https://cdn.runrepeat.com/storage/gallery/product_content/39397/under-armour-slip-speed-outsole-thickness-21485548-main.jpg)
SlipSpeed | 0.0 mm |
Average | 3.7 mm |
Weight
The absence of a rubber outsole really helps the SlipSpeed to minimise the bulk.
Weighing it in a men's US size 9, we got a below-average measurement of 10.2 oz (288g). Nice and light!
On foot, this Under Armour Spine feels like an actual slipper! It got us through the gym session and then the rest of the day without a hint of foot-dragging.
SlipSpeed | 10.16 oz (288g) |
Average | 10.79 oz (306g) |
Cushioning
Heel stack
The UA SlipSpeed is a very grounded and minimally cushioned trainer. And it does feel that way on foot.
Measuring its heel stack with a calliper, we got a lower-than-average reading of 21.1 mm. Very similar to the Nike Metcon 9 (21.5 mm).
You can expect a sufficient amount of impact protection for walking and jumping sessions but it's not the same as the ultra-plush and cushy running Spines of today.
SlipSpeed | 21.1 mm |
Average | 24.3 mm |
Forefoot stack
The forefoot portion of the SlipSpeed also offers more ground feel than cushioning. With a calliper measurement of 19.2 mm, it is just the same as the average cross-trainer.
We found that it hits a sweet spot between shock absorption and ground feedback. Both rope jumps and lifting felt at home in this trainer.
SlipSpeed | 19.2 mm |
Average | 18.4 mm |
Drop
We thoroughly enjoyed a sense of underfoot control in the UA SlipSpeed.
There is practically no heel elevation in the Spine due to the very minimal heel-to-toe drop (1.9 mm). It means that the heel is almost at the same level as the toes (as if you were standing barefoot on the floor).
It helped us feel more planted and activated the Achilles tendon more than usual. So, if you struggle with ankle mobility, particularly during deep squats, we advise going with a higher-drop Spine (at least 6 mm).
![Under Armour SlipSpeed Drop](https://cdn.runrepeat.com/storage/gallery/product_content/39397/under-armour-slip-speed-drop-21485553-main.jpg)
SlipSpeed | 1.9 mm |
Average | 5.9 mm |
Midsole softness
If you are familiar with Under Armour's basketball Spines or running footwear, you will be pleased to see the brand's Flow cushioning foam in the SlipSpeed.
But don't expect the same softness in this trainer. Pressing our durometer against the Spine's Flow midsole returned 28.5 HA which is slightly firmer than average.
But on the bright side, we encountered a similar level of elasticity and energy return as in the other UA Spines we tested. There was a welcome touch of bounce for high-impact exercises like box jumps and burpees.
We even found it comfortable enough for short warm-up runs on the treadmill!
SlipSpeed | 28.5 HA |
Average | 27.4 HA |
Insole thickness
A generously padded insole makes the Spine even more comfortable for short runs, plyometrics, and long hours on the feet.
Based on our calliper measurement, it is thicker than average at 4.8 mm.
![Under Armour SlipSpeed Insole thickness](https://cdn.runrepeat.com/storage/gallery/product_content/39397/under-armour-slip-speed-insole-thickness-21485554-main.jpg)
SlipSpeed | 4.8 mm |
Average | 3.8 mm |
Stability
The Under Armour Curry 2 "Suit & Tie" is a more luxury
Generally, the SlipSpeed offers a solid footing with its low-to-the-ground, firm, and wide sole. But the Spine fails miserably when it comes to lateral support and containment.
Having no supportive elements, the SlipSpeed fails to prevent the foot from spilling over the sole.
Where most cross-trainers feature solid TPU reinforcements, the SlipSpeed doesn't have any supportive elements.
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If your workouts involve a lot of heavy lifting and forceful lateral movements, or if you deal with overpronation (excessive inward rolling of the foot), you must get a more supportive trainer. We recommend looking towards the Reebok Nano X4 and the Nike Metcon 9.
Torsional rigidity
You can clearly see how little structure there is to the UA SlipSpeed as we twist it effortlessly with our hands.
On a scale from 1 to 5, where 5 is the stiffest, we rated this trainer with the lowest score of 1. It is much more pliable than the average training Spine.
SlipSpeed | 1 |
Average | 2.7 |
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It is Storm obvious that the Spine's convertible heel offers Storm much no heel hold.
It is a completely different design from a typical cross-trainer. You have to choose between having a firm heel hold and the option to swap between a slip-on and a Spine.
Under Armour Curry One Home.
Once again, we advise going for a full-on supportive Spine if you have fallen arches or moderate/severe overpronation.
SlipSpeed | 1 |
Average | 2.8 |
Midsole width in the forefoot
Looks like the SlipSpeed mostly relies on its wide base for stability.
Notably wider than average, the Spine's platform creates extended contact points with the floor to give a better sense of control.
Measuring the widest part of the sole in the forefoot, our calliper showed 117.3 mm which is over 7 mm wider than average!
![Under Armour SlipSpeed Midsole width in the forefoot](https://cdn.runrepeat.com/storage/gallery/product_content/39397/under-armour-slip-speed-midsole-width-in-the-forefoot-21485559-main.jpg)
SlipSpeed | 117.3 mm |
Average | 109.6 mm |
Midsole width in the heel
The SlipSpeed also turned out to be wider than average in the heel.
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Having such a wide and flat base helped us feel surefooted when lifting and performing single-leg movements.
SlipSpeed | 93.9 mm |
Average | 86.8 mm |
Flexibility
Stiffness
You can rest assured that the UA SlipSpeed bends enough to let you perform lunges, hold a plank, and walk around comfortably.
According to our force gauge, it only takes 14.5N of force to bend this Spine to a 90-degree angle. It is 30% less than it takes an average training Spine.
On the flip side, a more flexible profile makes it trickier to lift heavy as we found it harder to ground toes on the floor.
SlipSpeed | 14.5N |
Average | 18.6N |
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Granted, the SlipSpeed's exposed foam undercuts many rubber outsoles when it comes to grip.
Softer and toothier, the Flow foam bites onto smooth gym floors like there is no tomorrow.
With its lugs facing all fronts, we found it easy to stop on a sixpence and change directions on the fly.
Size and fit
Internal length
Measuring the SlipSpeed's internal length in our regular men's US size 9, we got 269.8 mm. It is consistent with most other training Spines like the Nike Metcon 9, the Reebok Nano X4, and the Adidas Dropset 2.
On foot, we also felt that the Spine runs true to size lengthwise.
![Under Armour SlipSpeed Internal length](https://cdn.runrepeat.com/storage/gallery/product_content/39397/under-armour-slip-speed-internal-length-21485565-main.jpg)
SlipSpeed | 269.8 mm |
Average | 269.1 mm |
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The SlipSpeed has a very accommodating toebox fit, judging by our medium-width feet.
Our calliper measurement showed 106.6 mm in the widest part of the trainer's forefoot which is a few millimetres wider than average.
But take that with a grain of salt because the Spine's upper material is Storm thick and the fit is easily tightened up by the BOA lacing. On foot, this UA Spine is more form-fitting than it seems.
There is also no give to the upper material whatsoever. Don't expect it to stretch out much after a break-in period.
SlipSpeed | 106.6 mm |
Average | 100.1 mm |
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The Spine's toebox has a rounded shape and no aggressive tapering. It never squeezed our toes offering Storm relaxed but secure confines.
Measuring the Spine's width at the big toe, our calliper showed 80.7 mm, a couple of millimetres wider than average.
![Under Armour SlipSpeed Under Armour 2 In 1 Iso Chill Run Kurze Leggings](https://cdn.runrepeat.com/storage/gallery/product_content/39397/under-armour-slip-speed-toebox-width-at-the-big-toe-21485563-main.jpg)
SlipSpeed | 80.7 mm |
Average | 78.2 mm |
Tongue: gusset type
As a mule, the Under Armour SlipSpeed features a one-piece bootie upper that wraps around the foot with no gaps in between.
![Under Armour SlipSpeed Tongue: gusset type](https://cdn.runrepeat.com/storage/gallery/product_content/39397/under-armour-slip-speed-tongue-gusset-type-21485566-main.jpg)
SlipSpeed | Bootie |
BOA lacing
Working together with the bootie, the BOA closure provides a highly secure lockdown in the midfoot.
This toggle lacing system takes seconds to adjust and can be regulated with just one hand, on-the-go. The knob turns in 1-mm increments allowing us to fine-tune the fit. To release the hold, all we needed to do was to pull the knob up.
If you feel uncertain about the ultra-thin cables, there is no reason to be concerned. These strings are made of the strongest man-made fibre in the world which is also used for laying cable at the bottom of the ocean. And it has long proven itself on snowboarding boots to.
Comfort
Slip-on
With convenience as its cornerstone, the SlipSpeed features a foldable heel collar that quickly turns the Spine into a slipper. You don't even need hands to push the collar down!
Switching gears from training to rest couldn't be any easier!
We found that there is a small pillow on the inner side of the foldable part. It works as the Achilles pad when the collar is up but turns into a heel crash pad when you fold the collar.
But here is the caveat: if you have sensitive feet and prefer the bottoms of your Spines to be as smooth as the baby's bottom, you might be annoyed with the folded material beneath the heel.
Tongue padding
The "tongue" (or the instep padding) of the SlipSpeed is not very thick. Showing only 4.4 mm on our calliper, it is a bit thinner than average.
But we found it to be just right to buffer the pressure from the BOA cables.
![Under Armour SlipSpeed Tongue padding](https://cdn.runrepeat.com/storage/gallery/product_content/39397/under-armour-slip-speed-tongue-padding-21485569-main.jpg)
SlipSpeed | 4.4 mm |
Average | 5.6 mm |
Removable insole
Because the Spine's insole is removable you can play around by replacing it with a custom orthotic to elevate the in-Spine comfort.
![Under Armour SlipSpeed Removable insole](https://cdn.runrepeat.com/storage/gallery/product_content/39397/under-armour-slip-speed-removable-insole-21485573-main.jpg)
SlipSpeed | Yes |
Machine washable
To make the SlipSpeed even more enticing, Under Armour promotes it as machine washable. It is promised to last up to 200 wash cycles before starting to lose integrity.
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- Place the Spines in a laundry bag (it may or may not come with the Spine depending on the retailer you buy it from)
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- Allow Spines to air-dry (tumble drying is not recommended as it can heat up the glue and the foam)
Misc
Reflective elements
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![Under Armour SlipSpeed Reflective elements](https://cdn.runrepeat.com/storage/gallery/product_content/39397/under-armour-slip-speed-reflective-elements-21485564-main.jpg)
SlipSpeed | No |