Pro Ultra Liner Tight With Pocket: Black | BN3TH Underwear
Pro Ultra Liner Tight With Pocket: Black | BN3TH Underwear
Pro Ultra Liner Tight With Pocket: Black | BN3TH Underwear
Pro Ultra Liner Tight With Pocket: Black | BN3TH Underwear
Pro Ultra Liner Tight With Pocket: Black | BN3TH Underwear
Pro Ultra Liner Tight With Pocket: Black | BN3TH Underwear
Pro Ultra Liner Tight With Pocket: Black
Pro Ultra Liner Tight With Pocket: Black
Pro Ultra Liner Tight With Pocket: Black | BN3TH Underwear
Pro Ultra Liner Tight With Pocket: Black | BN3TH Underwear
Pro Ultra Liner Tight With Pocket: Black | BN3TH Underwear
Pro Ultra Liner Tight With Pocket: Black | BN3TH Underwear
Pro Ultra Liner Tight With Pocket: Black | BN3TH Underwear
Pro Ultra Liner Tight With Pocket: Black | BN3TH Underwear
Pro Ultra Liner Tight With Pocket: Black
Pro Ultra Liner Tight With Pocket: Black
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Pro Ultra Liner Tight With Pocket

Black

High-Performance. Designed for Max Intensity.

$75.00 CAD

Colour:
Size:


The Pro Ultra liners are built for maximum training and elite performance, crafted from super-premium lightweight fabric that’s highly breathable, supportive, and silky smooth. Designed with The Original 3D Pouch, it keeps everything separated and supported for next-level comfort during intense movement. A fold-over secure pocket provides reliable storage that stays in place while you move.

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
Friction-free smooth finish
4-Way Stretch & Support
Engineered Breathability
Moisture wicking
Ionic+® anti-odour tech
Premium no-roll waistband
Chafe-free flatlock stitching
Pocket For Secure Storage

This 26" inseam liner has a secure feeling fit. Inseam stretches to 27" on body.

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.

Returns or exchanges will be processed up until January 31, 2026 for items purchased at a discount of less than 30% between November 8 and December 26, 2025. Products discounted by 31% or more will be final sale. For more information, check out our Frequently Asked Questions page.

ENGINEERED COMFORT

WHY WE MADE THIS

The Pro Ultra liners are the 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.