Under Armour Fly Fast 3.0 Shorts
by Under Armour
The Under Armour Fly Fast 3.
- Lightweight breathable fabric
- Secure zip storage
- Built-in liner support
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The Under Armour Fly Fast 3.0 Shorts are a strong choice for runners seeking a lightweight, supportive short with smart storage and moisture-wicking performance. The built-in liner and stretch fabric make them ideal for speed workouts and long runs alike, though those sensitive to compression may want to size up.
Key features
- UA Launch fabric with 4-way stretch
- Built-in brief liner for support
- Reflective details for low-light visibility
- Zippered pocket for storing keys or gels
- Anti-odor technology to fight bacterial growth
- Elastic waistband with internal drawcord
Pros & cons
PROS What we loved
- Extremely lightweight and breathable
- Liner stays in place during runs
- Great freedom of movement
- Sweat-wicking fabric dries fast
- Secure zip pocket for essentials
CONS Worth noting
- Liner may feel too compressive for some
- Limited color options in certain sizes
- Runs slightly small, sizing up recommended
Specifications
Full review
The Under Armour Fly Fast 3.0 shorts are engineered for serious runners who want a distraction-free experience mile after mile. Crafted from Under Armour's signature lightweight, quick-drying fabric, these shorts wick sweat away from the skin efficiently, keeping runners cool and dry even during intense training sessions or race day efforts. The 2-in-1 design combines a breathable outer layer with a built-in compression liner, offering supportive coverage without restricting the natural range of motion needed for a full stride. This thoughtful construction reduces chafing and bounce, letting athletes focus purely on their pace and performance rather than adjusting their gear mid-run.
Ventilation is a standout feature of the Fly Fast 3.0, with mesh panels strategically placed along high-heat zones to maximize airflow and minimize overheating during warm-weather runs. The shorts also incorporate UA's anti-odor technology, which fights the growth of odor-causing microbes, making them a reliable choice for back-to-back training days without a noticeable smell buildup. A secure, low-profile waistband sits comfortably against the skin, while an internal zippered pocket provides a safe place to stash a key, card, or gel packet, ensuring runners can carry essentials without needing an external pouch or belt.
Designed with the modern runner's lifestyle in mind, the Fly Fast 3.0 shorts strike a balance between performance-driven technology and everyday versatility. The reflective detailing enhances visibility for early morning or evening runs, adding a layer of safety for those training in low-light conditions. Available in multiple colorways, the shorts pair function with a clean, athletic aesthetic that transitions easily from the track to casual errands. Whether preparing for a marathon, logging daily training miles, or simply seeking a dependable pair of shorts for the gym, the Fly Fast 3.0 delivers the comfort, support, and durability that dedicated runners expect from Under Armour.
Customer reviews
These shorts have become my go-to for long runs. The liner never rides up and the zip pocket holds my gels securely.
Love the fabric and fit once I sized up. The reflective details are a nice touch for early morning runs.
Durable, breathable, and the anti-odor tech actually works after multiple wears without washing.
I use these for both easy runs and speed sessions. The liner support is excellent, though I wish there were more colors.
