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Performance Series

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

Fit tips

True to size

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: Black/Royal Blue
Black/Royal Blue
  • 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.

Customer Reviews

Based on 48 reviews
terry collins
Excellent boxers

I wish l had bought these before l bought another brand as they are super to wear easy to use when needed, fabric is great against your skin. Highly recommended.

Lonzie Helms
Solid underwear

I like the Crossfly underwear. They are pretty solid. Not as soft as some other brands but they are solid and support well

Bob Shaw

So far so comfy. Had a pair of crossfly’s before and they were comfy but these Pro 7” are even more so. Will definitely be after a couple more of these soon…

David W Clark
bought both Lg and XL sizes

As a person who is at the Top of the Lg size and the Bottom of the XL, I decided to buy both and return the least like size. After getting them I wore them both and like the little differences in size and feelings while wearing them. So I have kept both sizes and I am very glad with them both. The Large is a snugger fit and such. The XLarge is a little looser and both are very comfortable when exercising in them.

Chrisi Hall
Pants size

,the large size did not fit in the legs the medium are too tight.

Terry Williams
Awesome boxer briefs!

Super comfortable, fit is excellent, material is the most comfortable that I ever experienced, and shipping was fast. Great product!

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.