Trunk

Love them or they're free Limited Edition
£10.66
Shorter Leg
Anti-Chafe
Soft Bamboo Viscose
Anti-Sweat
Trunk - Blowfish - Bamboo Underwear - Model:Vince
Trunk - Blowfish - Bamboo Underwear - Model:Vince
Trunk - Blowfish - Bamboo Underwear - Model:Vince
Trunk - Blowfish - Bamboo Underwear - Model:Vince
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Trunk

Love them or they're free Limited Edition
£10.66
Shorter Leg
Anti-Chafe
Soft Bamboo Viscose
Anti-Sweat
Trunk - Black Currants Trunk - Scorpions Trunk - Smoking Gun Trunk - Ahoy Sailor Trunk - Smashed Avo Trunk - Juicy Plums Trunk - Butter Nuts Trunk - Snow Worries Trunk - Snowballs Trunk - Vivid Blue Trunk - Dark Green Trunk - Dark Navy Trunk - Deep Purple Trunk - Dark Grey Trunk - Glaciers Trunk - Salted Lime Trunk - Big Reds Trunk - Carbon Core Trunk - Winter Berry Trunk - Rouge Noir Trunk - Neon Strikes Trunk - Lyons Blue Trunk - Melange Slate Grey Trunk - Shredders Trunk - Yacht Rock Vol. 3 Trunk - Melange Dusty Canyon Trunk - Black Mambas Trunk - Hyper Glow Trunk - True Maroon Trunk - Yacht Rock Vol. 4 Trunk - Yacht Rock Vol. 5 Trunk - Desert Sage Trunk - Stonewash Grey

1. Select your fit

Boxer 6" Inseam Trunk 4" Inseam Front Fly 6" Inseam Sport 8" Inseam

2. Select your size

3. Select your quantity

4. Select your colours

Black Currants
Scorpions
Smoking Gun
Ahoy Sailor
Smashed Avo
Juicy Plums
Butter Nuts
Snow Worries
Snowballs
Vivid Blue
Dark Green
Dark Navy
Deep Purple
Dark Grey
Glaciers
Salted Lime
Big Reds
Carbon Core
Winter Berry
Rouge Noir
Neon Strikes
Lyons Blue
Melange Slate Grey
Shredders
Yacht Rock Vol. 3
Melange Dusty Canyon
Black Mambas
Hyper Glow
True Maroon
Yacht Rock Vol. 4
Yacht Rock Vol. 5
Desert Sage
Stonewash Grey
Blowfish
Crew / Ankle / No-Show Socks

Crew / Ankle / No-Show Socks

1
Free Shipping
30-Day Guarantee
Over 65k 5-Star Reviews

 

Don't be Koi - dive into our newest Limited Edition "BlowFish".

Say goodbye to chafing and say G'day to anti-chafe panels. We've strategically placed these bad boys to keep you feeling smooth and friction-free, so you can dance and jump without any discomfort. The 3D comfort pouch it like a cozy little hammock for your family jewels, and helps separate your balls from your legs.

Are you tired of constantly adjusting your underwear throughout the day? Introducing our ultra-comfortable men's Trunks, great for guys with thinner legs.

Our Boxer Brief & Trunk range is made from 95% viscose made from bamboo and 5% spandex. This equals an extremely soft and durable pair of underwear that wicks sweat brilliantly.

The sizing is considered "fitted", meaning that if you are in between sizes, we would recommend sizing up.

We aim to dispatch your order 1-2 business days after placing your order.

Free shipping, no minimum spend.

GENERAL SHIPPING TIMES:

UK Mainland = approx. 2-3 business days after dispatch.

International shipping is available and calculated at checkout.

We are so confident you'll love your Step Ones, we'll give you a FULL REFUND on your FIRST PAIR if you don't like them for whatever reason.

We Science'd Underwear

We didn't just make underwear. We reinvented it.

Ultraglyde™ Panels

Friction-resistant panels prevents chafing and ride-up, ensuring all-day comfort for your thighs. No more adjusting.

3D Comfort Pouch

Anatomically designed pouch keeps everything separated and supported, reducing friction and sweating.

Sweat Wicking

Advanced sweat-wicking tech keeps you dry and comfortable, even during the hottest days or toughest workouts.

Greg Taylor - CEO & Founder
Greg Taylor - CEO & Founder
26M+
Pairs Sold
65K+
5-Star Reviews
2M+
Happy Customers
Trustpilot

Trust Score 4.5/5

Real Results from Real Customers

Which Step Ones are right for me?

Compare our styles to find your perfect fit.

Best Seller
Boxer Brief

Boxer Brief

  • 6 inch in-seam
  • Anti-chafe Ultraglyde panels
  • Bamboo viscose fabric
  • Suits thicker legs
  • 3D comfort pouch
Shop Boxer Brief
Trunk

Trunk

  • 4 inch in-seam
  • Anti-chafe Ultraglyde panels
  • Bamboo viscose fabric
  • Suits thinner legs
  • Good for shorter guys
Shop Trunk
Boxer Brief Fly

Boxer Brief Fly

  • 6 inch in-seam
  • Anti-chafe Ultraglyde panels
  • Bamboo viscose fabric
  • Easy access front fly
  • 3D comfort pouch
Shop Boxer Brief Fly
Boxer Brief Sport

Boxer Brief Sport

  • 8 inch in-seam
  • Anti-chafe Ultraglyde panels
  • Bamboo viscose fabric
  • Longer for activity
  • 3D Comfort Pouch
Shop Boxer Brief Sport
30 Days

First Pair Guarantee

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

Risk-free trial
Full refund

Frequently Asked Questions

They are made from high-quality, organically grown Bamboo Viscose. This material is incredibly soft, breathable, and moisture-wicking, keeping you cool and dry all day long.
The Ultraglyde™ panels are friction-resistant panels on the inner thighs that prevent chafing and stop the legs from riding up. They ensure your legs glide past each other rather than rubbing.
Our 3D Comfort Pouch is anatomically designed to keep everything separated and supported. It reduces skin-on-skin contact, friction, and sweating, giving you the support you need without feeling restricted.
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.
Machine wash cold with like colors. Tumble dry low or line dry in the shade. Do not bleach, iron, or dry clean to maintain the quality of the bamboo fabric.