Do The Math Bitcoin Long Sleeve T-Shirt
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Designed In The USA, Ships Worldwide
Do The Math Bitcoin Long Sleeve T-Shirt
When Greg Foss tells you to do the math, you better sharpen that pencil. This long sleeve brings our legendary design to those chilly conference halls and late-night stacking sessions.
The numbers don't lie – and neither does this design. Clean mathematical equations meet bold Bitcoin energy in a shirt that speaks to every HODLer who's ever run the numbers on fiat vs. sound money. Perfect for layering during those early morning coffee runs or keeping warm while explaining monetary policy to nocoiners.
Available in sizes S-4XL with free shipping on all U.S. orders. Whether you're gifting it to a fellow number-cruncher or treating yourself to some mathematical Bitcoin swagger, this long sleeve does the talking while you do the stacking.
The math is simple: Bitcoin wins. The shirt just makes it look good.
| SHIRT LENGTH (inches) | CHEST WIDTH (inches) | CHEST TO FIT (inches) | SLEEVE LENGTH (inches) | |
| XS | 27 | 16 ½ | 31-34 | 25 |
| S | 28 | 18 | 34-37 | 25 ⅝ |
| M | 29 | 20 | 38-41 | 26 ¼ |
| L | 30 | 22 | 42-45 | 26 ⅞ |
| XL | 31 | 24 | 46-49 | 27 ½ |
| 2XL | 32 | 26 | 50-53 | 28 ⅛ |
Grab your gear here, then head to Bitcoin MENA 2026 (use code FOMO to save on tickets).
Typically ships in 3-5 Business Days. We offer a 30-day return/replacement guarantee.
Free & Easy Returns
100% Quality Guarantee
Trusted & Verified Seller
Designed In The USA, Ships Worldwide
