Pro Ultra Boxer Brief: Black
Pro Ultra Boxer Brief: Black
Pro Ultra Boxer Brief: Black
Pro Ultra Boxer Brief: Black
Pro Flex Boxer Brief Original 3D Pouch Technology
Pro Ultra Boxer Brief: Black
Pro Ultra Boxer Brief: Black
Pro Ultra Boxer Brief: Black
Pro Ultra Boxer Brief: Black
Pro Ultra Boxer Brief: Black
Pro Ultra Boxer Brief: Black
Pro Ultra Boxer Brief: Black
Pro Flex Boxer Brief Original 3D Pouch Technology
Pro Ultra Boxer Brief: Black
Pro Ultra Boxer Brief: Black
Pro Ultra Boxer Brief: Black
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Pro Ultra Boxer Brief

Black

High-Performance Versatility.

$0.00 CAD $40.00 CAD
Size:

Size Guide
Color:  5 Colors

The award-winning Pro Ultra is designed for max intensity and elite performance with super premium, lightweight fabric that is highly breathable, supportive, and silky smooth. These Boxer Briefs feature The Original 3D Pouch to ensure everything is separated and supported so you can always put your best foot forward.

The fabric is a breathable, moisture-wicking polyester blend mesh featuring Ionic+® anti-odour technology that does not wash out.

Fabric: 84% Recycled Polyester, 16% Spandex

The Original 3D Pouch
Breathable Mesh
Friction-free smooth finish
Ionic+® Anti-Odour tech
Premium No-Roll Waistband
Chafe-Free Flatlock Stitching

This 6.5" inseam Boxer Brief has a secure feeling fit.

View Size Guide


All BN3TH fabrics are soft and made from a performance stretch fabric. If your measurements are between sizes, select a larger size for a looser fit or a smaller size for a tighter fit.

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Free standard shipping is available on all orders above $75 (after discounts and before taxes).

All available shipping options will be visible at checkout. We ship orders within 1-2 business days, but this can increase during promotional periods.

For more information, check out our Frequently Asked Questions page.

ENGINEERED COMFORT

WHY WE MADE THIS

The Pro Ultra is our highest-performance, lightweight fabric in our line. It is all about max performance for whatever your training pursuit is - run, bike, hike, lift...We have you covered with the best in class performance Boxer Briefs.

SUSTAINABILITY MATTERS

Made with post-consumer recycled polyester fabric and elastic, this product is certified to the Global Recycled Standard (GRS).
OEKO-TEX® certified fabrics guarantee that our end products are tested and proven free from harmful toxic chemicals.

Overall rating: 4.888889 / 5 from 45 reviews.

AI Generated Review Summary

The Pro Ultra Boxer Brief in Black is highly praised for its quality and performance. Customers appreciate its supportive and breathable fabric, which is a blend of recycled polyester and spandex, featuring Ionic+® anti-odour technology. The Original 3D Pouch design ensures separation and support, making it ideal for intense activities.

Summary topics

  • Underwear Quality (24%): A significant amount of customers expressed appreciation for the great quality and performance of the underwear on their purchase.
  • Material Comfort (16%): Many customers expressed appreciation for the material, describing it as great, soft, and breathable.

Review topics: ["fit","fabric","weight","underwear","material","style","feel","boxers","comfort","seams","sweat","pouch","model","briefs","icon","activity","choice"].

Review highlights

  • "The material is light weight and breathable." — Jake K.
  • "The material is really soft and fits nicely." — Andrew P.
  • "Good material and comfort" — Andrew P.

Reviews

Pro Ultra - A Nice Welcome

"This style is very nice and has more of a form fitting feel while not feeling compressive! Unlike other brands, this more athletic model still keeps lots of room for movement while still maintaining full support, there’s no reduction in pouch space and it’s remained nicely breathable during more intense activities! As for material feel, it’s almost in between the classic icon and the pro flex, definitely still polyester but a nicer and softer knit feel than the pro flex"

— Lachlan M. (5/5)

Excellent

"Great athletic boxers, fabric wicks moisture, seams are smooth and the fit is so comfortable. Still prefer the icon for everyday but for sports these are really excellent."

— Meghan E. (5/5)

Great Choice

"Great choice for high activity, maintains and supports everything during higher level activities without relying on compression like other brands"

— Lachlan M. (5/5)

Great Choice

"Great choice for high activity, maintains and supports everything during higher level activities without relying on compression like other brands."

— Lachlan M. (5/5)

Lovin the Pro Ultra Boxer Briefs

"Although I just purchased the briefs a few weeks ago, they are super comfortable and are wearing well. The pouch is a game changer. I am 6’1” 195 and the large fits perfectly."

— Scott T. (5/5)

Maybe Best Ever

"The BN3TH may be the best men's underwear I've ever owned. I say maybe because they are super soft and live up to the anti-order claim so they're great when travelling. That said, I still like the classic icons and the pro flex, too. The icons are probably the softest, and the pro ultra the smoothest, if that makes sense. But overall, it's tough to find any fault with the pro ultras."

— Bryan B. (5/5)

"I've tried a few brands of premium men's underpants and so far, I'd say these have the best fit and comfort. Build quality is excellent. I'll probably replace many of my Saxx pairs with these."

— David (5/5)

Best Style Yet

"These are my very favourite boxers for wearing anytime. Great in hot weather, and I just find them really comfortable for regular daytime underwear. They hug your body and "stay put" even when you pull on your bluejeans."

— DC (5/5)

Perfect

"These Pro Ultra briefs (slste grey)fit great and feel amazingly soft. Another great product from Bn3th."

— Craig M. (5/5)

Good product

"This is my third order. The underwear and cycling liners are very good."

— Malcolm H. (5/5)

Q&A