Welcome to Blck Flag Co.

The Ultimate Underwear

Designed in Switzerland

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The PR Sneaker

In collaboration with Nmlss

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What they say?

Bro, these are definitely the most comfortable underwear I have ever owned. Thank you so much!

Jeff Loagz

They fit better than anything I have worn before. Even for sports & workouts.

Julian Pollersbeck

Unbelievable how amazing they fit. I probably will wear them everyday!

Marc Wieser

I am blown away. This is a masterpiece of underwear. I wear them everyday!

Oleg Cricket

Ordered the Body Pack twice & will probably do it again & again. I'm blown away by the design & comfort. Thank you!

Sven Ryser

Damn man, the packaging is crazy. Unbelievable what you guys created. I will rock them badass.

London Brown

Get to know us

More About us

Made to perform on the highest possible level. Experience a minimal design, athletic shape & the maximum of comfort & length.

If it comes to comfort, design and the perfect fit, our team made sure to deliver nothing but the best of all worlds. It all started with the fact, that our founder spent too many years in the wrong underwear. As a former football player & racing skier with quite strong legs, he traveled from competition to competition without his underwear riding up, pinching and sagging all the time. Instead of waiting and hoping for a brand to recognize this kind of problem he redefined the modern mens underwear by himself.