By Your Underwear Guy · Tried & Tested · Under Armour · Boxer Briefs · Trunks · Athletic Underwear
Look, I’ve spent more time thinking about what’s under my gym shorts than most people spend thinking about their entire wardrobe. And honestly? I’m not sorry about it. Good underwear is the foundation of everything — your workout, your confidence, your whole day. So when I finally sat down and committed to a proper Under Armour underwear review, I went all in. Three styles, worn hard, tested honestly.
If you’ve been searching for an honest Under Armour underwear review that actually comes from someone who lives in the gym and sweats through multiple pairs a week — welcome, you’ve landed in the right place. I tested the UA 6-Inch Boxer Jock, the UA 3-Inch Trunks, and the UA Charged Cotton 6-Inch Boxer Briefs, and I’m going to break down exactly who each one is built for. Spoiler: all three passed. But they’re not all for the same body type, and that matters.
I’ll also be dropping my personal photos wearing all three styles in this post — because you deserve to see how they actually look on a real body, not just a mannequin.
Why Under Armour? Is the hype real?
Under Armour has built its reputation on performance gear, and that DNA absolutely carries into their underwear line. If you’re Googling “is Under Armour underwear worth it” or “best athletic underwear for men”, the short answer is yes — they’ve genuinely earned their spot at the top of the athletic underwear conversation. The fabrics are technical, the construction is solid, and they don’t try to look like underwear pretending to be activewear. They just are activewear, through and through.
Style 1 — UA 6-Inch Boxer Jock
| Personal photo— UA 6-Inch Boxer Jock, worn by me |
| UNDER ARMOUR 6-INCH BOXER JOCK★★★★★Best for: bigger legs, tall guys, anyone who needs coverage that actually stays put.No ride-up | Great stretch | Functional fly | Bulge-friendly | Longer cut — not for everyone |
Let’s start with what matters most to a lot of guys — does it ride up? With the UA 6-inch Boxer Jock, the answer is a flat no. That extra inch of leg length grips your thigh properly and stays there. Whether you’re squatting, running, cycling, or just sitting at a desk, these do not creep. If you’ve got thick, muscular legs — and I mean the kind that make finding fitted jeans a mission — this is your style. The stretch in the fabric accommodates bigger quads without feeling like you’re fighting your underwear all day.
Now, the fly. I love that UA kept a functional fly across this whole range, and in the Boxer Jock it genuinely makes sense — it creates space, it sits well, and for those of us who appreciate a bit of natural enhancement in the front, it delivers without being ridiculous about it. The male bulge is supported and presented beautifully. There. I said it.
If you’re a taller or larger guy, this 6-inch cut is absolutely your friend. It gives you the coverage and the security that shorter styles just can’t offer when you’re built bigger.
| SUPPORT | COMFORT | STYLE |
| 9.5 / 10 | 9.0 / 10 | 8.5 / 10 |
Style 2 — UA 3-Inch Trunks
| UA 3-Inch Trunks, worn by me |
| UNDER ARMOUR 3-INCH TRUNKS★★★★☆Best for: muscular but proportionate legs, guys who want a clean athletic aesthetic.Sleek, athletic look | Functional fly | Great for photos | Not ideal for very thick legs |
Let me be honest — these are the showstopper pair. If aesthetics matter to you (and let’s be real, for a lot of us they absolutely do), the UA 3-Inch Trunks are stunning. They have that clean, tight athletic look that sits beautifully on a muscular frame. The shorter leg gives you more thigh on show, which works brilliantly if your legs are muscular but not exceptionally wide. Proportionate legs, not-too-thick thighs? These trunks will look exceptional on you.
They’re the pair I’d reach for if I’m heading somewhere I want to look and feel good — a pool day, a beach trip, or honestly just one of those days where you want your underwear to be part of feeling put-together. They photograph well, the profile is excellent, and the fly adds that same useful front space that the 6-inch styles do.
The honest caveat: if your legs are on the thicker side, the 3-inch cut can start to ride up mid-thigh. For guys with really powerful legs, I’d nudge you toward the 6-inch options instead.
| SUPPORT | COMFORT | STYLE |
| 8.0 / 10 | 8.5 / 10 | 9.5 / 10 |
Style 3 — UA Charged Cotton 6-Inch Boxer Briefs
| UA Charged Cotton 6-Inch Boxer Briefs, worn by me |
| UNDER ARMOUR CHARGED COTTON 6-INCH BOXER BRIEFS★★★★★Best for: everyday wear, guys who want performance tech with a cotton feel.Charged Cotton comfort | No ride-up | Great all-day wear | Functional fly | Slightly less performance than Boxer Jock |
If I had to pick a desert island pair, these might be it. The UA Charged Cotton fabric is genuinely something special — it has the softness and breathability of cotton, but it’s been engineered to wick moisture faster than standard cotton and dry far more quickly. What that means in practice is that you get that familiar cotton feel against your skin without the clammy, soggy situation that regular cotton can create during a workout or a hot day.
For everyday wear, the Charged Cotton 6-inch boxer briefs are simply excellent. They’re comfortable from the moment you put them on, the 6-inch leg stays put just like the Boxer Jock does, and the fly is clean and functional. These are the pair I’d recommend if you’re just getting started with UA underwear and you want something that works beautifully both at the gym and on a regular Tuesday.
If you’re someone who prefers a more natural-feeling fabric but still wants the technical benefits of performance underwear, the Charged Cotton line is exactly where to start.
| SUPPORT | COMFORT | STYLE |
| 9.0 / 10 | 9.5 / 10 | 8.5 / 10 |
The fly situation — and why it matters
All three styles have a functional fly, and in all three it genuinely works. It’s not just a decorative seam — it creates real space at the front, which means the fit sits better, the silhouette is more natural, and daily bathroom use is easy and practical. For guys who want a bit of visual forward presence, the fly architecture helps with that too. It’s a small detail that makes a real difference across a full day of wear.
Which Under Armour underwear is right for your body type?
Here’s the simple guide I’d give a mate who asked:
- Big legs or tall and larger build: Go straight for the 6-inch options — either the Boxer Jock or the Charged Cotton 6-inch Boxer Brief. The length locks the leg band against your thigh, no ride-up, full coverage, plenty of stretch.
- Muscular but proportionate legs: The 3-inch Trunks are your aesthetic winner. You’ll look incredible in them and they’ll feel great as long as your thighs aren’t extremely thick.
- You love cotton feel but want performance: Charged Cotton 6-inch. Start there and thank me later.
- Maximum athletic performance and support: The 6-inch Boxer Jock is your answer — it’s built for movement, built for the gym, and built for bodies that demand a lot from their underwear.
Frequently asked questions about Under Armour underwear
Does Under Armour underwear ride up?
Not if you choose the right cut for your body. Both 6-inch styles stayed firmly in place during all-day wear and intense workouts. The 3-inch Trunks can ride slightly if you have very thick thighs, so for bigger legs, stick to the 6-inch options.
Is Under Armour underwear good for the gym?
Yes, genuinely. The technical fabrics, moisture-wicking construction, and supportive cuts make UA underwear a strong choice for training. The Boxer Jock in particular is built for athletic movement and handles squats, lunges, and cardio without bunching or shifting.
Which Under Armour underwear is best for muscular guys?
It depends on your leg size. For very muscular, thick legs: 6-inch Boxer Jock or Charged Cotton 6-inch Boxer Brief. For muscular but not overly thick legs: the 3-inch Trunks look incredible and offer great aesthetics.
What is Under Armour Charged Cotton?
Charged Cotton is UA’s engineered cotton fabric that dries faster than regular cotton while retaining the soft, natural feel. It’s a great middle ground between fully synthetic performance fabric and everyday cotton comfort.
Does Under Armour underwear have a good bulge?
The functional fly across all three styles creates natural forward space and a flattering profile. For guys who want a defined, supported front without anything excessive, the fly construction works really well.
Is Under Armour underwear worth the price?
Yes. The quality of fabric, construction, and wear performance is consistently high. You’re paying for gear that holds up through repeated washing and hard use — these don’t lose their shape or support quickly.
Final verdict
| FINAL VERDICTUnder Armour has absolutely earned a place in any serious man’s underwear drawer. All three styles I tested delivered on comfort, support, and durability. The two 6-inch options are standouts for bigger, more muscular builds — no ride-up, great stretch, and a functional fly that genuinely works. The Charged Cotton Boxer Brief is my personal everyday favourite for its softness and all-day versatility. And the 3-inch Trunks? If you’ve got the legs for them, they’re the most aesthetically striking pair of the three. For any guy who cares about what he wears underneath — and you should — Under Armour is a brand worth investing in. |