The BN3TH Pro Flex Max Boxer Brief is built for high-output comfort and support. Featuring an advanced 7" inseam, a wide no-roll waistband, and patented 3D Pouch technology, these athletic trunks utilize permanent Ionic+® anti-odor mesh fabric. Read more.
The BN3TH Pro Flex Max Boxer Brief elevates your active base layer to a piece of high-performance equipment. Specifically built to handle the intense physical demands of training, these performance trunks discard standard cotton construction in favor of a technical polyester mesh matrix. The Pro Flex Max is tailored to stay firmly locked in place hiking the ridge lines around Vernon or tearing up the wake on Kalamalka Lake.
The Original 3D Pouch™: Designed with a patented, three-dimensional internal pocket that naturally lifts, cradles, and separates your anatomy, completely eliminating sticky friction, skin pinching, and the need for constant manual adjustments.
Breathable Performance Mesh: Woven from a lightweight blend of 89% recycled polyester and 11% spandex that maximizes multi-directional airflow, actively venting body heat away during peak output.
Ionic+® Permanent Anti-Odor Tech: Infused with pure antimicrobial silver ions that disrupt odor-causing bacteria on contact, ensuring your gear stays fresh session after session without ever washing out.
Extended 7" Inseam & Wide Waistband: Outfitted with a supportive, non-chafing 7-inch length for maximum thigh coverage and a premium, extra-wide no-roll elastic waistband that anchors comfortably to your core.
Chafe-Free Flatlock Stitching: Assembled with flat, smooth structural stitching intentionally placed out of high-friction zones to protect your skin from painful irritation during marathon movement blocks.
Eco-Conscious Construction: Built responsibly utilizing Global Recycled Standard (GRS) certified post-consumer recycled plastic bottles and verified OEKO-TEX toxic-free fabrics.
Standard athletic underwear tends to compress everything flat against your body, which traps heat, holds onto sweat, and guarantees severe chafing after an hour of heavy movement. BN3TH completely transforms this experience with their legendary 3D Pouch. By isolating and supporting, it lets the breathable poly-spandex mesh fabric pull sweat off your skin instantly.
