← Catalog

Under Armour Infinite Mega

In production · road · Long run / Recovery · $250

Towering dual-BOA max-cushion trainer co-developed with Speedland.

Built for long run, recovery, at a target pace of 8:30–11:30 /mi on road.

The spec sheet

Weight
298 g / 10.5 oz
Heel stack
43 mm
Drop
8 mm
Plate
—
Cushioning
5 / 5
Energy return
4 / 5
Responsiveness
3 / 5
Rocker
4 / 5
Flexibility
2 / 5
Stability
3 / 5 (5 = most guidance)
Toe-box
Standard
Sizing
True to size
Durability
~450 mi
Price
$250

How it rides

The foam

Under Armour tuned this midsole very soft (5/5 on our cushioning scale). Energy return is above average: the midsole rebounds well without feeling unstable. At 43 mm of heel stack this sits in max-cushion territory; legs stay fresher on long efforts, but the platform is tall. Combined, the ride reads as lively at 3/5 responsiveness.

The plate

There is no plate here. The midsole does all the work, so the shoe flexes naturally and stays versatile across paces — easier on the feet day to day, but without the snap of a plated shoe when you want to roll.

The geometry

A 8 mm drop is the mainstream middle — familiar to almost anyone coming from a standard trainer. The rocker is aggressive: the sole is curved and stiff enough to tip you into the next stride on its own, which saves the calf on long runs but feels strange when you slow right down. The forefoot is stiff, so it rolls rather than bends — a lever, not a slipper. Support is light — neutral, with a mildly steady platform.

Fit, sizing & life

The toe-box is standard width — comfortable for most feet without swimming. It fits true to size. Expect roughly 450 miles from the outsole, about $0.56 per mile at $250.

For the foams and plates Under Armour uses across its line, read the Under Armour brand guide.

How it compares

Measured against the 542 currently-available shoes in the catalog. The bar shows where this shoe sits in that range.

Weight

298 g / 10.5 oz

23 g heavier than the catalog median of 275 g

Heel stack

43 mm

7 mm taller than the catalog median of 36 mm

Drop

8 mm

2 mm higher than the catalog median of 6 mm

Price

$250

90 pricier than the catalog median of 160

Responsiveness

3 / 5

Catalog median 3 / 5

Cushioning

5 / 5

Catalog median 4 / 5

Energy return

4 / 5

Catalog median 3 / 5

Durability

~450 mi

Catalog median ~400 mi

Within the Under Armour line it is heavier than the brand's median (275 g / 9.7 oz) and sits taller than its median stack (36 mm).

Closest alternatives

Current shoes with the nearest combination of weight, stack, drop, foam feel and plate.

On Cloudeclipse 2

290 g / 10.2 oz · 42 mm · 6 mm drop · — · $190

Double-layer CloudTec for On's softest long-run ride.

Asics Gel-Nimbus 28(2026)

283 g / 10.0 oz · 44 mm · 8 mm drop · — · $180

Deep, plush max cushion for slow miles and heavier runners.

Nike Structure Plus(2026)

309 g / 10.9 oz · 42 mm · 10 mm drop · — · $170

ZoomX over ReactX stability at 42 mm — smooth and steady, not fast.

Asics Gel-Kayano 32(2025)

304 g / 10.7 oz · 40 mm · 8 mm drop · — · $180

Stability icon with 4D Guidance and a softer, higher stack.

Hoka Clifton 11(2026)

258 g / 9.1 oz · 42 mm · 8 mm drop · — · $150

Softer and taller than ever, still the accessible Hoka daily.

Lineage & siblings