Men's Underwear

Burton Lightweight Boxer - Men's

$15.99 ~~$29.95~~

ExOfficio Give-N-Go Sport Mesh Print 6in Boxer Brief - Men's

$18.96 ~~$33.95~~

ExOfficio Give-N-Go 2.0 Boxer - Men's

$19.46 ~~$25.95~~

ExOfficio Give-N-Go 2.0 Brief - Men's

$14.96 ~~$19.95~~

ExOfficio Give-N-Go 2.0 Sport Mesh 6in Boxer Brief - Men's

$22.46 ~~$29.95~~

Icebreaker Anatomica Boxer + Fly - Men's

$28.98 ~~$45.00~~

Icebreaker Anatomica Seamless Boxer - Men's

$41.25 ~~$55.00~~

Mountain Khakis Bison Boxer Brief - Men's

$18.00 ~~$25.95~~

Outdoor Research Next to None 6in PRT Boxer Brief - Men's

$25.46 ~~$33.95~~

Patagonia Essential 3in Boxer Brief - Men's

$22.40 ~~$32.00~~

Saxx Kinetic Boxer Brief - Men's

$27.71 ~~$36.95~~

Saxx Ultra Boxer Brief Classic - 3-Pack - Men's

$59.98 ~~$85.90~~

Saxx Volt Boxer Brief - Men's

$19.97 ~~$32.95~~

Saxx Undercover Trunk - Men's

$19.60 ~~$27.95~~

Saxx Sport Mesh 5in Boxer Brief + Fly - Men's

$18.71 ~~$24.95~~

Stoic Merino Performance Boxer Brief - Men's

$19.99 ~~$49.95~~

Stoic Performance Stretch Boxer Brief 3-Pack - Men's

$39.95

Stance Storm Trooper Boxer Brief - Men's

$24.49 ~~$34.99~~

Stance Staple Butter Blend Wholester 6in Underwear - 2-Pack - Men's

$38.49 ~~$54.99~~

Stance Spida Combed Cotton Wholester 6in Underwear - Men's

$20.99 ~~$29.99~~

Smartwool Merino Sport 150 Brief Underwear - Men's

$18.75 ~~$25.00~~

Under Armour O Series 6in Boxerjock - 2-Pack - Men's

$26.25 ~~$35.00~~

Under Armour Tech Mesh 6in Underwear - 2-Pack - Men's

$33.75 ~~$45.00~~

Under Armour Tech Mesh 6in Novelty Underwear - 2-Pack - Men's

$29.99 ~~$39.99~~

Under Armour Tech 9in Underwear - 2-Pack - Men's

$26.25 ~~$34.99~~

Duckworth Vapor Wool Brief - Men's

$29.95 ~~$39.95~~

ExOfficio Give-N-Go Sport Mesh 6in Boxer Brief - 2-Pack - Men's

$35.97 ~~$54.95~~

ExOfficio Give-N-Go 2.0 Boxer - 2-Pack - Men's

$35.21 ~~$46.95~~

ExOfficio Give-N-Go 2.0 Sport Mesh Brief - Men's

$19.46 ~~$25.95~~

ExOfficio Give-N-Go 2.0 Sport Mesh 9in Boxer Brief - Men's

$23.96 ~~$31.95~~

Icebreaker Anatomica Boxers - Men's

$28.98 ~~$45.00~~

Marmot Performance 6in Boxer Brief - Men's

$25.46 ~~$33.95~~

Mons Royale Hold 'Em Boxer Brief - Men's

$36.98 ~~$49.95~~

Ortovox Merino Rock'N'Wool Boxer - Men's

$37.50 ~~$50.00~~

Patagonia Essential 6in Boxer Brief - Men's

$18.99 ~~$32.00~~

Saxx Ultra Brief + Fly - Men's

$18.20 ~~$25.95~~

Saxx Quest 2.0 8in Boxer Brief - Men's

$23.80 ~~$33.95~~

Saxx Platinum Boxer Brief - Men's

$23.96 ~~$34.95~~

Saxx Undercover Boxer Brief + Fly - 2-Pack - Men's

$37.43 ~~$49.90~~

Saxx Sport Mesh 5in Boxer Brief + Fly - 2-Pack - Men's

$29.93 ~~$39.90~~

Stoic Performance Stretch Boxer Brief 3-Pack - Men's

$17.97 ~~$39.95~~

Stoic 8in Performance Boxer Brief 3-Pack - Men's

$29.96 ~~$39.95~~

Stance Sith Boxer Brief - Men's

$24.49 ~~$34.99~~

Stance Mariner Butter Blend Wholester 6in Underwear - Men's

$24.49 ~~$34.99~~

Stance Regulation Butter Blend Boxer Brief - Men's

$20.99 ~~$29.99~~

Smartwool Merino Sport 150 Boxer Brief Underwear - Men's

$26.25 ~~$35.00~~

Under Armour HG Armour 2.0 Comp Short Brief - Men's

$19.59 ~~$27.99~~

Under Armour Armourvent Mesh 6in Underwear - Men's

$14.96 ~~$29.99~~

Under Armour Tech Mesh 9in Underwear - 2-Pack - Men's

$25.98 ~~$39.99~~

Under Armour Tech 3in Underwear - 2-Pack - Men's

$26.24 ~~$34.99~~

ExOfficio Give-N-Go Printed Boxer Brief - Men's

$18.99 ~~$29.95~~

ExOfficio Sol Cool Brief - Men's

$17.95 ~~$31.95~~

ExOfficio Give-N-Go 2.0 Boxer Brief - Men's

$19.46 ~~$25.95~~

ExOfficio Give-N-Go 2.0 Sport Mesh 6in Boxer Brief - 2-Pack - Men's

$41.21 ~~$54.95~~

Hurley Pro Light 18in Boxer Short - Men's

$23.96 ~~$31.95~~

Icebreaker Bodyfit Anatomica Zone Long Boxer - Men's

$32.70 ~~$65.00~~

Marmot Performance 8in Boxer Brief - Men's

$19.99 ~~$35.95~~

Minus 33 Micro Boxer Brief - Men's

$29.99 ~~$39.99~~

Patagonia Sender 6in Boxer Brief - Men's

$20.99 ~~$30.00~~

Patagonia Essential 6in Boxer - Men's

$22.40 ~~$32.00~~

Saxx Blacksheep Boxer Brief + Fly - Men's

$33.71 ~~$44.95~~

Saxx Loose Cannon Boxer - Men's

$25.46 ~~$33.95~~

Saxx Quest Boxer - 2-Pack - Men's

$42.68 ~~$56.90~~

Saxx Daytripper 5in Boxer Brief + Fly - Men's

$18.71 ~~$24.95~~

Saxx Kinetic HD Boxer Brief Underwear - Men's

$28.46 ~~$37.95~~

Stoic Casual Underwear - 3-Pack - Men's

$11.96 ~~$39.95~~

Stoic Casual Underwear - Men's - 3-Pack

$39.95

Stance Staple Butter Blend Wholester 4in Underwear - Men's

$24.49 ~~$34.99~~

Stance Standard Combed Cotton Wholester 6in Underwear 2-Pack- Men's

$31.49 ~~$44.99~~

Smartwool Merino 150 Boxer Brief - Men's

$36.00 ~~$48.00~~

Smartwool Merino 150 Printed Boxer Brief - Men's

$30.99 ~~$48.00~~

Under Armour HG Armour 2.0 Long Short Brief - Men's

$20.99 ~~$29.99~~

Under Armour Tech Mesh 3in Underwear - 2-Pack - Men's

$29.98 ~~$39.99~~

Under Armour Charged Cotton 6in Underwear - 3-Pack - Men's

$29.99 ~~$39.99~~

Under Armour Tech 6in Seasonal Underwear - Men's

$11.98 ~~$24.99~~

ExOfficio Give-N-Go Sport Mesh Print 3in Boxer Brief - Men's

$23.96 ~~$31.95~~

ExOfficio Give-N-Go Boxer - Men's

$16.98 ~~$25.95~~

ExOfficio Give-N-Go 2.0 Boxer Brief - 2-Pack - Men's

$35.21 ~~$46.95~~

ExOfficio Give-N-Go 2.0 Sport Mesh 3in Boxer Brief - Men's

$20.96 ~~$27.95~~

Icebreaker BodyFit 150-Ultralite Anatomica Brief - Men's

$25.99 ~~$40.00~~

Icebreaker Anatomica Cool-Lite Boxer - Men's

$37.50 ~~$50.00~~

Marmot Performance Boxer - Men's

$19.99 ~~$33.95~~

Nike Pro Long Short - Men's

$17.46 ~~$24.95~~

Patagonia Sender 6in Boxer - Men's

$20.99 ~~$30.00~~

Patagonia Essential A/C 6in Boxer Brief - Men's

$23.80 ~~$34.00~~

Saxx Vibe Modern Fit Boxer - 3 Pack - Men's

$64.43 ~~$85.90~~

Saxx Undercover Boxer Brief - Men's

$19.97 ~~$27.95~~

Saxx Undercover Boxer Brief - Men's

$20.96 ~~$27.95~~

Saxx Daytripper 5in Boxer Brief + Fly - 2-Pack - Men's

$27.97 ~~$39.90~~

Saxx Kinetic HD Long Leg Underwear - Men's

$29.96 ~~$39.95~~

Stoic Performance Stretch Brief 3-Pack - Men's

$17.96 ~~$39.95~~

Stance Butter Blend Wholester Boxer Brief - Men's

$24.50 ~~$35.00~~

Stance Staple Butter Blend Wholester 6in Underwear - Men's

$24.49 ~~$34.99~~

Stance OG Combed Cotton Wholester 6in Underwear - Men's

$17.49 ~~$24.99~~

Smartwool Merino 150 Pattern Boxer Brief - Men's

$22.68 ~~$45.00~~

Smartwool Merino 150 Boxer - Men's

$37.50 ~~$50.00~~

Under Armour O Series 6in Novelty Brief - Men's

$18.75 ~~$25.00~~

Under Armour Tech Mesh 6in Underwear - 2-Pack - Men's

$27.69 ~~$39.99~~

Under Armour Tech 6in Underwear - 2-Pack - Men's

$26.24 ~~$34.99~~

Under Armour HG Rush Comp Short - Men's

$35.00 ~~$50.00~~

Canada Goose Hybridge Glove

$150

Hybridge Glove...

Canada Goose Women's Gloves

Women's Gloves

Price subject to change | Available through Backcountry.com

RockShox SID Ultimate Carbon 29in Boost Fork

$999

Racing has never been an afterthought for you. It would be better described as your life choice. You train hard through...

RockShox Mountain Bike Components

Mountain Bike Components

Price subject to change | Available through Backcountry.com

Ortlieb Commuter City 21L Daypack

$174.95

Commuter City 21L Daypack...

Ortlieb Men's Everyday Packs

Men's Everyday Packs

Price subject to change | Available through Backcountry.com

The North Face Downtown Parka - Women's

$135.2 55% off

When the weather feels nearly arctic, but you don\'t want to wear a bulky body-suit just to venture outside, The North...

The North Face Women's Insulated Jackets

Women's Insulated Jackets

Price subject to change | Available through Backcountry.com

Currently Viewing Men's UnderwearShop by Brand

All Men's Clothing

Men's Button-Down Shirts

Men's Hiking & Climbing Pants

Men's Hiking & Climbing Shorts

Men's Hoodies & Sweatshirts

Men's Hybrid Shorts

Men's Insulated Jackets

Men's Insulated Pants

Men's Mountain Bike Accessories

Men's Performance Jackets

Men's Performance Shirts

Men's Performance Tights & Pants

Men's Polo Shirts

Men's Rain & Wind Jackets

Men's Rain & Wind Pants

Men's Shirt Jackets

Men's Sleepwear & Robes

Men's Softshell Jackets

Men's Softshell Pants

Men's Sweaters

Men's Sweatpants

Men's T-Shirts

Men's Technical Shell Jackets

Men's Technical Shell Pants

Men's Underwear

Tri Accessories

Featured Park

Grand Teton National Park

Rising above a scene rich with extraordinary wildlife, pristine lakes, and alpine terrain, the Teton Range stands monument to the people who fought to protect it. These are mountains of the imagination. Mountains that led to the creation of Grand Teton National Park where you can explore over two hundred miles of trails, float the Snake River or enjoy the serenity of this remarkable place.

Featured Wildlife

American Pika

The pika is a close relative of the rabbits and hares, with two upper incisors on each side of the jaw, one behind the other. Being rock-gray in color, pikas are seldom seen until their shrill, metallic call reveals their presence.

Men's Underwear

Popular Topics

Popular Road Trips

Locate a Park

Popular Gear

Site Info

Socialize with Us