100% of net profits from this shirt go to the Bitcoin Red Team via OpenSats through December 31, 2026.

When the code failed, the community didn't. This tee is a tribute to the Bitcoiners who answered a crisis the way only Bitcoiners do — by rolling up their sleeves and hunting down the next vulnerability before it could claim anyone else. After the Coldcard firmware flaw drained self-custody wallets in one of the darkest weeks Bitcoin has seen, a volunteer crew of security researchers mobilized around the clock, tore through hundreds of open-source projects, and responsibly disclosed thousands of findings to the people who could fix them. No permission asked. No payday expected. Just conviction that Bitcoin is worth defending.

That's the spirit this design salutes: the auditors, the whitehats, the maintainers, and the plebs who understand that "open source" only means auditable — someone still has to do the auditing. The Coldcard incident proved that a flaw can sit in public code for years, examined by almost no one; the Red Team's answer was to go looking. Wear it to signal you stand with the people keeping the network honest, one repo at a time. Because there is no Bitcoin without self-custody, and no self-custody without the folks willing to break things so the rest of us don't get broken.

Here's the rundown: a mid-weight 4.2 oz./yd.² (142 g/m²) tee cut from 100% combed and ring-spun cotton, with a touch of polyester in the heather shades. Pre-shrunk to hold its fit through every wash, and reinforced with side seams and shoulder-to-shoulder taping for durability that keeps up with you. Blank product sourced from Nicaragua, Mexico, Honduras, or the US.

Size guide