CLASSIC BRIEF WITH FLY: BLACK
CLASSIC BRIEF WITH FLY: BLACK
CLASSIC BRIEF WITH FLY: BLACK
CLASSIC BRIEF WITH FLY: BLACK
CLASSIC BRIEF WITH FLY: BLACK
CLASSIC BRIEF WITH FLY: BLACK
CLASSIC BRIEF WITH FLY: BLACK
CLASSIC BRIEF WITH FLY: BLACK
CLASSIC BRIEF WITH FLY: BLACK
CLASSIC BRIEF WITH FLY: BLACK
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CLASSIC BRIEF WITH FLY: BLACK

Ultra-Soft, Lightweight, Elevated All-Day Comfort.

$28.00 USD

Size:

Size Guide

  • XXS 26″-28″
    66-71cm
  • XS 28″-30″
    71-76cm 
  • S 30″-32″
    76-81cm
  • M 32″-34″
    81-86cm
  • L 34″-36″
    86-91cm
  • XL 37″-40″
    94-101cm
  • XXL 41″-44″
    104-112cm

For underwear, if you are between sizes we recommend choosing the smaller of the two. EG: If you're a 34" waist, go with a Medium.

Boxer Brief

6.5″ / 16.5cm Leg Inseam

Available in the Classic, Classic with Fly, Pro Ionic+™, Infinite Ionic+™, Hero Knit, Entourage, Merino Wool, North Shore Chamois, Hockey Jock

Shop Boxer Briefs

Trunk

3.5″ / 9cm Leg Inseam

Available in the Classic, Classic with Fly, Pro Ionic+™

Shop Trunks

Brief

0″ / 0cm Leg Inseam

Available in the Classic

Shop Briefs

Full Length

29″ / 73.5cm Leg Inseam

Available in the Classic, Pro Ionic+™, Merino Wool and Hockey Jock

Shop Full Lengths
  • XXS 26″-28″
    66-71cm
  • XS 28″-30″
    71-76cm 
  • S 30″-32″
    76-81cm
  • M 32″-34″
    81-86cm
  • L 34″-36″
    86-91cm
  • XL 37″-40″
    94-101cm
  • XXL 41″-44″
    104-112cm

For bottoms, if you are between sizes we recommend choosing the larger of the two. EG: If you're a 32" waist, go with a Medium.

PJ Long

30″ / 76cm Leg Inseam


Shop PJ Long

PJ Short

10″ / 25.5cm Leg Inseam


Shop PJ Short

Joggers

30″ / 76cm Leg Inseam


Shop Joggers

Crew Tee

21″ / 53.5cm Chest

32″ / 81cm Length


Shop Tees

Merino Henley

19.5″ / 49.5cm Chest

29″ / 74cm Length


Shop Merino

Color: 3 Colors


These luxury Briefs with Fly feature an ultra-soft, breathable, lightweight TENCEL™ Modal that is sustainably sourced, guaranteed to stay smooth and keep you comfortably supported at all times.

The Original 3D Pouch lifts and supports everything, eliminating the need to shift or adjust.

Fabric: 95% TENCEL™ Modal, 5% Spandex

MyPakage Pouch Technology™
Chafe-free flatlock stitching
Premium no-roll waistband
Cloud-like breathability
Ultra-soft, smooth feel
TENCEL™ Modal is sustainably-sourced

Model shown is 6’0” tall, 175lbs, has a 32” waist and is wearing a size medium.

This Brief with Fly has a free 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. Sale items are final sale and cannot be returned for a refund or exchange. For more information, check out our Frequently Asked Questions page.

ENGINEERED COMFORT

WHY WE MADE THIS

Our Classic Collection pairs ultra-soft comfort with fabric made from naturally-breathable TENCEL™ Modal fibers and The Original 3D Pouch for unrivaled support all day, every day.

SUSTAINABILITY MATTERS

These are made from sustainably-sourced TENCEL™ Modal fibers. As a renewable resource, birch trees are consciously farmed and turned into fiber.
OKEO-TEX™ guarantees that our end products are tested and proven free from harmful toxic chemicals.
The waistband is GRS-certified, as the elastic comes from post-consumer recycled Polyester.
An accreditation with Canopy ensures these cellulose fabrics aren't being produced at the expense of ancient and endangered forests, nor impact the species that inhabit them.