Boxer briefs
"Comfortable and keeps things where they need to be kept."
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Black/Skydiver/Acid Lime 3 Pack
Multi-packs
The Pro Flex is engineered to move with minimal friction and complete comfort. 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: 89% Recycled Polyester, 11% Spandex
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
SUSTAINABILITY MATTERS
Overall rating: 4.6666665 / 5 from 12 reviews.
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Reviews
Somebody had a good idea
"I really like the design. the 2 little flaps that sneak besides the jewels prevent sticking when sweating. I ride long hours on my motorcycle and that sticking has been very uncomfortable."
Comfy AF!
"Comfy, breathable, fit like a dream!"
always a welcome gift
"I buy these for the men in my family. My son always appreciates the graphics and the comfortable fit."
Best
"Simply the best underwear!"
Great ginch!
"Very happy with my purchase. Comfortable, sit nice, don’t ride, great fabric."
Still Looking.
"For a while I have been trying to find the best mesh boxers. I have tried a handful of popular brands, and decided to try these since they were on sale. The material feels like it's good quality, but the design isn't quite right. I regularly find myself having to pull them up during the day. These probably work well for a lot of people, but they don't seem to be right for me."
Perfect balance
"Great for an all day active lifestyle from chilling to the gym and everything in between."
Love these!
"I'm addicted to BN3TH! These feel great and are the best underwear I've ever owned!"
Pro Flex Boxer Briefs
"I bought the medium three pack of the pro flex boxer briefs. I have a 33” waist, according to the fitting chart should work. I tried all three pairs and they pinched in the groin area. I have purchased briefs from my package and bn3th before and opted with size large, with no issues. I also noticed that the material has change from the previous purchases."