Under Armour Men's Multi-Pack Performance Tech Long-Leg Boxer Brief in

In this review the Under Armour Men's Multi-Pack Performance Tech Long-Leg Boxer Brief is assessed for athletes and active men who need underwear that stays comfortable through movement. The single biggest reason to buy is the combination of the brand's Performance Tech fabric that is both soft and breathable and the 4-way stretch construction that allows unrestricted motion, making these briefs a practical choice for running, gym sessions, and long days on the move.

Key Features

• Lightweight fabric: The material feels light against the skin, reducing bulk under shorts or pants so users stay comfortable all day.
• Performance Tech comfort: The fabric is described as insanely soft and breathable, which helps keep skin cool during activity.
• 4-way stretch construction: The stretch moves with the body in every direction, improving mobility during exercise or daily tasks.
• No-roll hem & chafe-free seams: The hem and seams are designed to stay in place and minimize irritation during repetitive motion.
• Performance waistband: A branded waistband provides a secure fit and helps the brief stay positioned without pinching.
• Articulated mesh fly: The mesh fly panel and gusset increase ventilation where it matters most for added comfort.

Who It's For

These boxer briefs are best for active men who prioritize soft, breathable underwear that moves with them. Runners and gym-goers will appreciate that the briefs stay in place and wick moisture, and the 9 in inseam provides extra thigh coverage compared with shorter styles.

Men who need extremely long-lasting heavy-duty work underwear or those who prefer a looser, boxier fit should look elsewhere; the fit is described as fitted, streamlined rather than roomy, and a small number of customers reported seam durability issues under heavy wear.

Pros & Cons

Pros

• Comfortable, soft fabric that breathes well during activity.
• Stays in place during running and movement thanks to the no-roll hem and performance waistband.
• 4-way stretch and articulated mesh fly add mobility and targeted ventilation.
• Good length with a 9 in inseam that many customers praise for coverage.

Cons

• Some users reported seam failures over time, so durability may vary by use and washing routine.
• Fitted cut may feel too snug for those who prefer a loose underwear style.

Specifications

Our Verdict

The Under Armour Performance Tech long-leg boxer brief is a strong choice for active men who want soft, breathable underwear that stays put during exercise. It offers good value for those prioritizing comfort and mobility, though buyers who need extreme long-term durability or a loose fit should consider alternatives.

Frequently Asked Questions

Are these boxer briefs good for running?
Yes; the 4-way stretch, no-roll hem, and moisture-wicking fabric help them stay in place and manage sweat during runs.

Do they run true to size?
The fit is described as fitted and streamlined, so choosing your normal size is appropriate unless you prefer a roomier fit.

Is the fabric breathable for hot weather?
Yes; the Performance Tech fabric is noted for being insanely soft and breathable and it wicks sweat to dry quickly.