"Proof of Work" Sweat-Activated T-Shirt

First 2023 design addition to our Proof of Work Apparel (TM) line of products for Bitcoiners.

Up your game, print your apparel with sweat activated ink. Graphics printed using sweat activated ink are completely invisible until activated with moisture. As the shirt becomes wet, the design begins to appear. The more the person sweats, the clearer these graphics become. Once the shirt begins to dry the images disappear, ready to start the cycle again. Are you ready to put in the work?

Made in America.



Shipping Information

Our on-line store is open 24/7 and we ship Monday through Friday, excluding some holidays. Orders received for products without shipping restrictions on its product page will ship the same business day when received before 12:00 p.m. PST. Orders in high demand will have an estimated production time listed on its product page and will ship according to the date listed.