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

Our review of the Under Armour Men's Multi-Pack Performance Tech Long-Leg Boxer Brief finds them best suited to active men who want a streamlined, stay-put undershort for daily training and long runs. The single biggest reason to buy is the combination of the brand's Performance Tech fabric that feels exceptionally soft and the 4-way stretch construction that moves freely without riding up, delivering reliable all-day comfort and breathability under workout gear or casual clothes.

Key Features

• Insanely soft fabric: The Performance Tech material feels smooth against skin, reducing irritation during extended wear.
• Breathable design: Articulated mesh fly panel and gusset allow airflow where it is needed most to help keep you cool.
• 4-way stretch construction: Fabric stretches in every direction so the boxer brief moves with dynamic activity without binding.
• No-roll hem and chafe-free seams: The leg hem stays in place during runs and the seamless sides and back minimize friction for comfort.
• Performance waistband: A branded elastic waistband holds the brief up without digging in or requiring adjustment.

Who It's For

These boxer briefs are ideal for active men who prioritize comfort and mobility: runners, gym-goers, and anyone who spends long hours on their feet. The 9' inseam provides extra coverage compared with shorter undershorts, which many customers praise for preventing ride-up during exercise.

Those who want maximum longevity from value purchases or who need heavy-duty work underwear might look elsewhere, as customer feedback on durability is mixed and some users have reported seam issues after extended use.

Pros & Cons

Pros

• Soft, breathable fabric that wicks sweat and dries quickly for comfortable activity.
• 4-way stretch and fitted cut that feels supportive without being too tight.
• No side or back seams and a no-roll hem that reduce chafing and keep the leg in place.
• Performance waistband with wordmark for a secure fit and modern look.

Cons

• Durability is mixed across customers, with some reporting seam splitting over time.
• Perceived value varies; some find the price high compared with alternatives.

Specifications

Brand	Under Armour
Style	Multi-Pack Performance Tech Long-Leg Boxer Brief
Inseam	9 in
Fabric	Performance Tech, lightweight and breathable
Construction	4-way stretch with mesh fly panel and gusset
Features	Tagless, no-roll hem, chafe-free seams, performance waistband

Our Verdict

The Under Armour Performance Tech long-leg boxer brief is a smart buy for athletes and active men who want a soft, breathable undershort that stays put during movement; its fitted cut and 4-way stretch deliver reliable comfort. If long-term toughness is your top priority, consider rotating pairs or checking heavier-duty options, since durability feedback is mixed.

Frequently Asked Questions

Are these boxer briefs good for running?
Yes, the 9 in inseam and no-roll hem help prevent ride-up and the fabric wicks sweat to keep you comfortable on runs.

Do they feel bulky under pants?
No, the Performance Tech fabric is lightweight and streamlined, so they sit smoothly under workout shorts or jeans.

How does the fit run?
The briefs are fitted with a streamlined cut that is not too tight or too loose; the 4-way stretch adds flexibility for different body shapes.