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Because X is why

Y-Fronts have been around since 1934 and in nearly a century Men's underwear has not really moved on. We decided it was time to reboot the system; and in the process we found that X is better, faster, easier... and X is WHY.

Just reach through your trouser fly and pull down on the X-Fly Thumb Tab!

Take a pair of these for a test drive and we promise you'll never look back. The X-Fly just makes too much sense, (and sometimes speed really matters)!

Thumb Tab

Locate the X-Fly opening easily with the Tumb Tab, which features a tactile Crossfly logo.

Whether you're in a rush or in the dark, the Thumb Tab guarantees immediate access. A small but very effective feature.


A short cut for easy access!


Thumb Tab central location point eases the process even more. Just reach in and go.


Whether you’re on the 15th tee, on a 10 mile hike, or just have a weak bladder. When nature calls, the X-Fly has you covered.


It’s not just more efficient, it also looks great.

A Faster, Easier Way

Just reach through your trouser fly and pull down on the Thumb Tab!

No more unbuttoning your trousers or pulling down the waistband of your underwear. Our patent pending technology creates a short cut to simplify the process of taking a leak.

Love them, or get your money back.

"Don't know why the idea of having the fly opening at the top is not a common feature on other underwear on the market as for me, I was very impressed how much easier it was to access for call of nature!"

Neil Gordon

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.