Numbers don't lie — and neither does your gains. This Under Armour athletic tee rocks a clean chalkboard-style Bitcoin formula that speaks to every data-driven HODLer who knows the math checks out.

Built with Under Armour's signature lightweight, quick-dry performance fabric, this shirt keeps you cool during workouts while your portfolio runs hot. The relaxed fit moves with you whether you're crushing PRs or explaining why 21 million matters.

Perfect gift for the analytical Bitcoiner who backs up their convictions with actual math. Available in sizes S-4XL with free shipping on all U.S. orders.

Show up to Bitcoin 2026 in April knowing you did the math first — and got the shirt to prove it.

Grab your gear here, then head to Bitcoin 2026 Las Vegas (use code FOMO to save on tickets).