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Comfortable Men's Underwear

6" Boxers

Longer + Fly

3" Trunks

Shorter + Fly

7" Boxers

Sports + Fly

Crew Socks


Low Cut Socks


No Show Socks


Money back guarantee

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

Read Reviews
Our Technology

Extremely comfortable, keeping everything in place. The material is superb. They are a joy to wear.

Peter Cordwell, Feb 2022

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.