Under Armour UA Infinity High Sports Bra - High Support (Style 51B9)
Under Armour UA Infinity High Sports Bra - High Support (Style 51B9)
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Our review of the Under Armour UA Infinity High Sports Bra finds it best suited for women seeking serious, high-impact support during running, court play and high-intensity classes. The single biggest reason to buy is its molded, PU injected one-piece padding and structured design that keeps everything in place during bounce-heavy activity while staying surprisingly light. Built-in mesh and HeatGear fabric manage sweat, and the smooth sweat-wicking band with hook & eye closure makes it functional for repeated use.
Key Features
- Strategic support: Tailored for high-support activities so breasts stay secure during running and aerobics without shifting.
- PU injected padding: Molded one-piece padding provides added coverage and a more aerodynamic, lighter feel for fast movement.
- Breathable mesh: Front mesh panel improves airflow across the chest to reduce overheating on long runs or court sessions.
- Sweat-wicking band: Smooth HeatGear band pulls moisture away from skin and the hook & eye closure makes it easier to get on and off.
- Convertible straps: Front adjustable straps convert to crossback for a custom fit and added stability during dynamic movement.
Who It's For
The bra is ideal for runners, athletes who play court or field sports, and anyone who needs solid containment during high-impact exercise; its structure and injected padding are designed to limit bounce and maintain shape. The HeatGear fabric and mesh panels also suit people who sweat heavily and want quick-drying performance.
Those who prefer a very loose or fashion-forward bralette style, or who need a very specific custom fit because they have an unusual cup-to-band ratio, may want to try it on first or consider other models, since some customers report a mixed fit and a tendency to run small for certain sizes.
Pros & Cons
Pros
- High level of support keeps breasts stable during running and high-impact workouts.
- Molded PU padding offers comfortable coverage and a lighter, aerodynamic feel.
- HeatGear fabric with mesh panels wicks sweat and improves breathability.
- Convertible, adjustable straps and hook & eye band provide a customizable fit and easier on/off.
Cons
- Fit is mixed for some users and may run small, so trying or checking sizing guidance is advised.
- Some users find the hook & eye closure or padding awkward to manage when dressing, making ease of putting on variable.
Specifications
| Brand | Under Armour |
| Design | High-support sports bra with molded one-piece padding |
| Padding | Injection-molded PU one-piece padding |
| Fabric technology | HeatGear sweat-wicking fabric |
| Ventilation | Front mesh panels for added breathability |
| Closure | Smooth band with hook & eye closure |
| Straps | Front adjustable, convertible straight or crossback |
Our Verdict
The Under Armour UA Infinity High Sports Bra is a solid choice for athletes who need dependable high-impact support and fast-drying comfort. Its molded PU padding and convertible straps deliver both containment and customization, making it good value for runners and court players; check sizing carefully since fit can vary between wearers.
Frequently Asked Questions
Is this bra good for long distance running?
Yes. The design focuses on high-impact support and the padding helps reduce bounce for running and long workouts.
Does it breathe well during intense exercise?
Yes. Front mesh panels and HeatGear fabric improve airflow and wick moisture to keep skin drier.
Is the band easy to get on and off?
The smooth band has a hook & eye closure to simplify dressing, though some users report varying ease depending on fit and mobility.
Editor's Take
The UA Infinity High Sports Bra is great for runners and high-impact athletes, offering molded PU padding, convertible straps and HeatGear fabric for secure, breathable support; check sizing before buying.

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