Bortle 1 Or Bust T-Shirt | Umbravoid
Bortle 1 Or Bust T-Shirt | Umbravoid
The Bortle Scale goes from 1 to 9. Bortle 9 is downtown Manhattan. Bortle 1 is pristine, untouched darkness where the zodiacal band spans the entire sky and your own shadow is cast by Venus. Most people have never seen Bortle 1. You drive hours to find it. This tee is the rallying cry of dark sky chasers everywhere — those who plan vacations around light pollution maps, who know their local Bortle number by heart, and who consider anything above Bortle 3 a compromise. The minimal scale graphic adds a visual shorthand that fellow enthusiasts clock instantly. Bold statement, insider knowledge, zero explanation for the uninitiated. Premium cotton for the road trip to darkness. Available in 7 sizes (S–4XL) and 10 colorways.
- 100% soft ring spun U.S. cotton fabric & cotton threads
- Proud member of the U.S. Cotton Trust Protocol
- OEKO-TEX certified low-impact dyes
- Salt free clean pigment dye colors
- Plastic-free packaging — polybags removed on all colors except White
All of our shirts are shipped directly from the United States. Orders are processed within 1 to 2 business days and 4-6 days of delivery
- The standard shipping fee is $5.99
- All orders over $99 is free shipping
Organic Cotton
GOTS certified. Grown without pesticides. Soft, breathable, built to last decades.
Colorfastness
Water-based inks cured at 320°F. Wash after wash, the design stays as sharp as the night sky.
Peer Reviewed
Every design is verified against current astronomical data. Coordinates are real. Objects are real.
Made in USA
Produced in the United States. Shorter supply chain, lower footprint, faster delivery.