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Performance Series

PRO Men's 7" Boxers - Black/Royal Blue

Fit tips

True to size

Color: Black/Royal Blue
Black/Royal Blue
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
  • First Pair Money Back Guarantee


Crossfly PRO 7 Inch Boxer is built to work with your every movement and crafted with 3D breathable, fast drying panels that ensures maximum comfort. The Pro 7 also features our patent pending technologies; the Coccoon and X-Fly. This is your ultimate workout partner.


  • Fabric: 85% polyester / 15% spandex
  • Breathable fabric & articulated mesh fly & seat panel

The Pro 7" Boxers are not only packed with features to enhance support and comfort; they are also ultra breathable and sweat wicking. Take a look at our reviews to see why these boxers are the ultimate workout partner.


    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.

  • Stay Fresh

    Anti-microbial and eliminates unwanted smells.

  • Breathable

    Breathable mesh panels get rid of moisture and dries fast for maximum comfort.

  • Planet Friendly

    Buy Nice, Not Twice.

This style is true to fit.

An athletic fit with a 7-inch inseam so they sit higher on your hips a little higher to offer more support. And of course, the ZeroFold Waistband ensures it stays in place.
The sportier type who is looking for more support and compression when working out. The Pro 7" Boxer is designed for a wide range of more active sports from football to HIIT.

Money back guarantee

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

Customer Reviews

Based on 107 reviews
Patrick Robinson
Planning a motorbike trip

Riding a motorbike all day sounds easy right..? Well, it is but you do have to plan for your own comfort because sitting in warm temperatures, encased in expensive textile safety garments can get you a bit steamy in the nether regions. For that reason, I chose Crossfly 7" boxers to give me the best chance of a chafe free holiday. Nice breathable fabric, flat seams (v important when sitting for long periods) and don't forget the "instant access" that the Crossfly design gave you in the first place! Getting through multiple layers of clothing at the services is hugely eased with this function.
So, you don't have to be a fit athlete to enjoy the features of this gear, just order some and wait for it to pop through your letterbox.

Richard Martyn
Look good but ...

I was not happy with the underwear. The fit wasn't right, the pocket didn't work for me. I would like to return the 3 pairs I have.

Jake Johnson
1 week

Only have this boxers for a week and best I have had on I was a bit suspicious due to never spending 55 pounds on boxers but if you exercise or even just walking around and your underwear climbs up your legs these DONT change your comfort today

Keith Arnold
Best of the Best

Great fit, comfortable, sharp looking and non-chafing….All around good value!

Matt Wammes


Keith Arnold
Best I have ever purchased…

Comfortable, sharp looking and supportive!

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.