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Everyday Series

3-Pack: Crossfly IKON 6" Boxer - Navy

Fit tips

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

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: Navy
  • First Pair Money Back Guarantee

3 packs of IKON 6" Boxers

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.

• Fabric: 95% modal / 5% elastane

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 6-inch inseam style is a mid-rise which means they’ll sit on your hips nicely for a classic look. Not too high, not too low.

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.

Customer Reviews

Based on 132 reviews
James Slater
Best ever

Very comfortable and secure with very good access. Best underpants I have ever had. Better than M&S, Calvin Kline etc.

John D Miller


Pierre T.
So Comfortable!

Excellent product overall: fit and design are on point. They provide support where you need it and they’re just so comfortable.

Gavin Berry
Great products

Like having your man parts cupped by angels

Samuel Golding
Not perfect, but pretty close

I've been on a quest for a few months to identify the boxer briefs that will refresh my entire drawer. But before ordering a doz+ pairs form anyone I've been ordering one at a time trying them. For me, thus far, these are the winners. The fit is great. Very comfortable. The fabric is not too heavy or warm. The "pouch" works and you really don't have to put the boys in, they just sorta end up in the pouch. That said this pouch is not as supportive as say the pouch by "All Citizens". But you have to 'put' you boys in that one.

The parts that are not 100% perfect -
- Pouch could be a little more supportive (like All Citizens... but not all Citizens, thats too much)
- Legs could stay in place better... not sure how to do this and maintain the current comfort level but thats my pipe dream.
- Waist bad folds... granted if I was not such a fat fux I'm sure it would not be a problem... I guess I cold just loose 20lbs.

Best I've found thus far... I like more than All Citizens, Mack Weldon, Nike, Adidas...

Teresa Griffith
Partner likes them

His cotton pants deteriorate so quickly. Synthetic Rapha pants have kept their shape, colour and integrity - no longer sold. (He'd also said synthetics were more comfortable to cycle in). He said Crossfly were, "Very good." Like other reviewers here I will buy more in the future. He has a 37" waist and liked the medium. I bought one large - just in case - he "didn't pay too much attention to it" so they were tolerable, no need to return. He wears them under cycling tights, commutes 8-9 miles each way, continuing to wear them under work trousers all day, under loose trackies at home.

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.