Name: Pro Flex Trunk: Black
Brand: BN3TH
SKU: M221016-028-XS
Price: 22.4 CAD
Availability: InStock
Rating: 4.8 (560 reviews)

BN3TH Pro Flex Trunk: Black Men's Underwear

BN3TH Classic Icon Trunk Men's Underwear: Black

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Size:

xxl

Color: 1 Color

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The Pro Flex is engineered to move with minimal friction and complete comfort. These Trunks 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: 89% Recycled Polyester, 11% Spandex

The Original 3D Pouch

Breathable Mesh

Friction-free smooth finish

Ionic+® Anti-Odour tech

Premium No-Roll Waistband

Chafe-Free Flatlock Stitching

Model shown is 6’1” tall, 185lbs, has 32” waist and is wearing a size medium.

This 3.5" inseam Trunk 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 Flex is all about keeping the sweat wicked, your form tight and the body feeling fresh. So go run, lift, climb, play…the Pro can tackle any workout without holding you back. And with Ionic+® anti-odor technology, you can focus on what matters most.

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: 4.8078294 / 5 from 562 reviews.

AI Generated Review Summary

The Pro Flex Trunks are highly praised for their comfort, fit, and quality. Customers appreciate the breathable, moisture-wicking fabric and the minimalist design. However, some have noted inconsistencies in sizing.

Summary topics

Comfort (4%): It was observed by customers that the comfort of the product is excellent, amazing, and perfect.
Fit (28%): A significant number of customers stated that the fit of the product is perfect, great, excellent, and fantastic.
Quality (5%): Customers expressed satisfaction with the great quality of the product, which was mentioned multiple times in the reviews.
Sizing (4%): In general, customers found the sizing to be inconsistent, with some finding it too loose in the waist and legs.
Design (4%): Customers keep praising the great, minimalist, and beautiful design of the product. (7 out of 20 reviews)

Review topics: ["size","fit","length","support","fabric","material","look","colour","style","feel","design","problem","quality","comfort","pattern","legs","band","boyfriend","liner","addition","pair","shorts","underwear","boxers","trunks","boxer briefs","wear","boxer","briefs","pro"].

Review highlights

"Supportive but not restrictive, comfortable fabric that is actually durable, perfect fit, sweet design." — Daniel C.
"great design, fit, feel and quality - super comfortable and look great!" — John M.
"I love the comfort and fit, and I love the feel of the material." — Walter M.

Reviews

Like the simple change-up from pure black

— Lachlan M. (5/5)

"The Pro Flex (previously just called the Pro) is a pair that I really like to have around when I’m planning on doing less crazy intensive activities like biking, jogging, tennis, badminton, light-to-moderate hiking, and a simple/quick workout… But these are also great day-to-day too if you don’t mind slightly tighter athletic focussed styles over looser comfort focussed styles like the classic icon. Everything is supported, breathable, and I think that everyone should have at least one pro flex if they’re fans of the classic icons or other pairs… Compared to the boxer briefs, the trunks are slightly less restrictive for your range of motions but also just work better for shorter inseam athletic shorts (like running shorts without liners) or maybe you just like trunks more… ultimately they’re not much different than the boxer briefs style"

— Lachlan M. (5/5)

"Great fit and a great product."

— Troy (5/5)

nice fabric very lightweight

"nice fabric very lightweight"

— Michael B. (5/5)

"Probably the most uncomfortable underwear ive ever had, and really expensive for what they are."

— Michael (1/5)

Great product

"Purchased for my son, he loves them. Super comfortable."

— Katie F. (5/5)

"Confortable mais les coutures au niveau des cuisses semble épaisses et frotte quand je marche."

— Guillaume (4/5)

Pro Flex Trunk

"I purchased 3 of the new Pro Flex trunks from these guys. I have been wearing the trunks for a couple of years now and love them! The fit on the trunks are smaller than the regular trunks and the elastic waistband is very tight. I really don't care for the type of fabric that they use for the Pro Flex trunks. Not sure whether I'm going to return them or not yet. I much prefer the regular trunks"

— Rick T. (4/5)

Awesome!

"Awesome fit for a great price!"

— John R. (5/5)

"Vraiment confortable"

— verrier (5/5)

Black