Here by popular request, one of our top-selling t-shirt designs of all time is now available in a long sleeve! The Do The Math Bitcoin Long Sleeve T-Shirt combines sharp mathematical equations with bold typography, urging everyone to crunch the numbers and see why Bitcoin makes sense. Featuring a sleek, high-contrast design with a subtle Bitcoin nod, this shirt is perfect for Bitcoiners who love logic, finance, and a touch of intellectual flair. Stay warm while making a statement—because when you do the math, the future is clear.

• 100% airlume combed ring-spun cotton
• Heather colors are 52% combed and ring-spun cotton, 48% polyester
• Athletic Heather and Black Heather are 90% combed and ring-spun cotton, 10% polyester
• Fabric weight: 4.2 oz./yd.² (142.4 g/m²)
• 32 singles
• Regular fit
• Side-seamed construction
• Crew neck
• Cover-stitched collar
• 2″ (5 cm) ribbed cuffs
• Blank product sourced from Nicaragua, Honduras, or the US

Size guide