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Everyday Series

Crossfly Men's Trunks - IKON 3" - CHARCOAL

Fit tips

We recommend you go down a size in this style if you sit in-between sizes to get a more contoured fit as the modal fabric is very stretchy. (Ie: if normally a S/M or 31-32", please opt for S)

Size: S 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
Color: Charcoal
  • First Pair Money Back Guarantee


Our game-changing Everyday Series is the ultimate premium underwear, combining two patent-pending technologies. The innovative X-Fly provides fast and easy access, and our Coccoon internal pocket support system minimizes chafing and provides optimal comfort and support. Teamed with our super-soft Modal fabric, we are confident Crossfly will soon become your everyday 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.

We recommend you go down a size in this model if you want a more contoured fit, as the modal fabric is very stretchy.
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.

Customer Reviews

Based on 75 reviews
Big Guy
Soft as silk

Very comfortable and supportive
You do need to order one size smaller than you are as I am 2xl but ordered just xl which are just right

Adrian Newton
Badly manufactured

Brand new, worn once and already hole noted in rear. Quite expensive so not expected!

Hi Adrian, we're very sorry that you have received what seem to be a faulty pair. Our underwear is made from premium fabrics and so this should not happen. We'll get back to you privately to deal with your order. Kind regards,
Val & The Crossfly Team

Peter La Porte
Value for money


Ian Dalzell
Top quality

Ordered a pair a few months ago to try them and was blown away by how comfortable and well fitted they were. A few months later and I've ordered a two more pairs. Crossfly will eventually replace all other underwear i have.
The price can possibly put some people off but Crossfly will not disappoint.

Martin Walton
Satisfied repeat customer

Very pleased with the quality and fit of these Icon X 3" Trunks and ordered a further supply as a result. Happy to recommend.

Brain Lilley
New favourite pants

Super comfy trunks and the crossfly access is great, no more fishing around. 👍

Money back guarantee

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

"Arrived on Saturday and I can honestly say that they are worth every penny"

- Vince Harris

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.