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Everyday Series

IKON Men's 3" Trunks - Hemp Grey

Fit tips

Can fit one size too big. If on the cusp of a size, please opt for a size down. Read more in the "How it fits" section below.

Color: Hemp/Grey
Size: XS What's your size?
Size Guide

Men's Underwear

underwear size guide

The measurements on the size chart are body measurements. Find your correct size in the chart below.

Note that each style may fit differently due to the fabric used.

Size Chart








Waist (Inch)







Waist (cm)








Fit Tips

IKON & IKON X styles: (Choose one size smaller)

This style is made from Modal fabric which is quite stretchy. As such, we recommend that you order one size smaller than your usual size for a better fit.

PRO 7" style: (True to size)

Our customers find this style fits true to size.


How to measure

  • WAIST: Measure around the narrowest part (typically where your body bends side to side), keeping the tape horizontal.
  • INSEAM: Measure the from where your crotch meets the top of your inner leg.
Crossfly-how to measure
  • First Pair Money Back Guarantee


The IKON 3" trunk is the ultimate premium men's underwear, combining two patent-pending technologies. The X-Fly provides fast and easy access and our Coccoon internal pocket support system minimises chafing and provides optimal comfort & support. Teamed with our super-soft Modal fabric, these will become your go-to favourites.

  • 95% modal / 5% elastane
  • Super soft fabric for next-to-skin comfort that dries fast and remains breathable

We have spent 3.5 years working on the best & most technical pair of underwear man has ever seen; and reviews show that it works. But, they’re not just technical, they are also the most comfortable pair you will ever wear.


    Eliminates skin on skin friction and chafing providing greater comfort and support.

  • X-FLY

    Easier, faster access when nature calls.

  • ZEROFOLD 360

    Stays in place however active you are. 4-way stretch construction works with your every movement.

  • DRI-PX2

    ‘No Show’ Dual layer protects against excess drips and moisture.

This boxer is made from Modal fabric which is naturally quite stretchy. As such, we recommend that you order one size smaller than your usual size for a better fit.

Fit one size too big.

Choose S if normally M (31,32")
Choose M if normally L (34, 35")
Choose L if normally XL (38, 39")

This 3-inch inseam style is a low-rise which means they’ll sit lower on your hips for a trendy look.

Model waist size is 32" and wears size Small
The guy who goes between the gym and the boardroom. This versatile pair is designed for a wide range of sports from running to hiking as well as more relaxed activities.

Money back guarantee

Love them, or we'll refund or exchange your first order.

Customer Reviews

Based on 243 reviews
Donald Belfus
3" trunks

I purchased the size according to the size chart, wish I had ordered a size smaller. Feels like too much material. They are nice though.

Paul Giglio
Bad design

Nothing stays where they’re supposed to.

Ceir Coral
Outstanding fit and comfort!

Very pleased with Crossfly! I’m a fan. Definitely go one size down if you’re between sizes.

Lisa-Jane Cross
So far so good.

I bought them for my son as a birthday present but he's a young man of few words when it's about his underwear. He hasn't complained so they must be ok or more than ok, as I bought them for supporting his 'crown jewels' more than for anything else. What I'm really pleased about is that he received them quickly by post, as he's living in the middle of nowhere in the Highlands of Scotland. Well done postie.

Dan Bright
Crossfly are going places!

The best underwear I have ever worn. So comfortable and so clever!

One small but kinda big problem

So the material of the underwear feels great no complaints there. I do experience some ride up in the thighs so that’s not so pleasant but I can deal with that. So here’s where it’s a little problematic, let’s put it this way…anytime my not so little guy gets “happy”, it pops out the access fly and says hello. That would be fine and acceptable if it occurred when I’m about to get action but let’s face it men randomly get “happy” so that’s where it’s a bit problematic. Not sure if this issue wasn’t taken into consideration when designing these underwear, but it’s kinda strange to me that it wouldn’t be a factor when designing them. I can’t be the only person who has experienced this either but yea it’s a pretty big draw back to the underwear.

Crossfly has been a vision of a small team of sporting product professionals from the UK and America. Together, we have acquired decades of experience working in the Sports industry for global brands within Marketing and Product Innovation. After a few false starts, some legal issues, a eureka moment, and a global Pandemic Crossfly was finally ready to get going.

WE'VE RAISED THE BAR and deliver the most comfortable underwear and socks you will ever wear; packed with patent pending technologies and features that offer ultimate comfort whatever you're doing. GAME. CHANGED.