Men's Bamboo Underwear

Anti-chafe Ultraglyde panels and sweat-wicking bamboo viscose, in every cut from Brief to Sport.

  • Free shipping
  • 30-day First Pair Guarantee

Boxer Brief

6″ inseam · Suits thicker legs

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  • Boxer Brief

    6″ inseam · Suits thicker legs

    Shop Boxer Brief
  • Best Sellers

    Black

    $33

  • Core Colours

    Purple

    $33

  • Limited Edition

    Salted Lime

    $33

  • The Essentials

    Boxer Brief 4 Pack

    $132

  • Colour Pop

    Boxer Brief 4 Pack

    $132

  • Precious Metals 4 Pack

    Boxer Brief

    $132

  • The Full Week

    Boxer Brief 7 Pack

    $231

  • Classic Week

    Boxer Brief 7 Pack

    $231

  • Darks Week

    Boxer Brief 7 Pack

    $231

Size

Colour

1
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Trunk

4″ inseam · Suits thinner legs

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  • Trunk

    4″ inseam · Suits thinner legs

    Shop Trunk
  • Best Sellers

    Black

    $33

  • Core Colours

    Green

    $33

  • Limited Edition

    True Maroon

    $33

  • The Essentials

    Trunk 4 Pack

    $132

  • The Darks

    Trunk 4 Pack

    $132

  • The Full Week

    Trunk 7 Pack

    $231

  • Solid Week

    Trunk 7 Pack

    $231

Size

Colour

1
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Boxer Brief Fly

6″ inseam · Easy access front fly

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  • Boxer Brief Fly

    6″ inseam · Easy access front fly

    Shop Boxer Brief Fly
  • Best Sellers

    Black & Grey

    $33

  • Core Colours

    Orange

    $33

  • Limited Edition

    $33

  • The Essentials

    Boxer Brief Fly 4 Pack

    $132

  • The Darks

    Boxer Brief Fly 4 Pack

    $132

  • Darks Week

    Boxer Brief Fly 7 Pack

    $231

  • The Full Week

    Boxer Brief Fly 7 Pack

    $231

Size

Colour

1
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Socks

Crew, ankle and no-show

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  • Socks

    Crew, ankle and no-show

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  • Crew Sock

    White

    $18

  • Ankle Sock

    Black

    $18

  • No Show Sock

    Black

    $18

Size

Colour

1
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NiteKnit Sleepwear

Set, shirt and shorts

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  • NiteKnit Sleepwear

    Set, shirt and shorts

    Shop NiteKnit
  • Sleepwear Set

    Midnight Black

    $119

  • Sleepwear Shirt

    Midnight Black

    $55

  • Sleepwear Shorts

    Midnight Black

    $65

Size

Colour

1
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CloudPress Pro

Compression tights in three lengths

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  • CloudPress Pro

    Compression tights in three lengths

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  • CloudPress Pro

    Knee-Length, 3/4-Length, Full-Length

    $65

Size

Colour

1
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More styles

  • More styles

  • Boxer Brief Sport

    Panthers

    8″ inseam · Longer for activity

    $33

  • Brief

    Blue Ocean

    New

    $30

  • Cloud Mesh

    Black

    Extra breathability for sports that get hot

    $40

Size

Colour

1
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Real Results from Real Customers

What customers say about Step One.

Rated 4.5 out of 5TrustScore 4.5

30-day First Pair Guarantee

Love them or they're free. If you don't love your first pair, we'll give you a full refund.

Frequently Asked Questions

What's the difference between a Boxer Brief and Trunk?

The only difference between the two is that Boxer Briefs have 3 cm more leg length than the trunks.

What type of underwear is best for me?

It depends on your preference! We have a range of underwear that will suit anyone's body type, shape, and height.

Here's our buying guide:
Boxer Brief - Designed for men with thicker legs
Trunk - Shorter length (4" inseam) - ideal for men with thinner legs
Boxer Brief Fly - Easy access fly, perfect for corporate or formal occasions
Boxer Brief Sport - 8" inseam - extra length for strenuous exercise
Long Johns - Keeps you warm & dry, perfect for colder days and activity

What underpants should I choose if I play sport?

All our underwear is built for movement, but if you’re into sport we recommend the Boxer Brief Sport to prevent ride up for extreme movement, Cloud Mesh for sports that can get hot and need extra breathability and Long Johns for winter.

How does the First Pair Guarantee work?

We are so confident you'll love your first pair of Step One underwear that if you don't, you can keep them and we'll give you a full refund. No questions asked. This applies to your first single pair purchase.