"Proof of Work" Sweat-Activated T-Shirt Size:Large The quick playtime and evolving

The quick playtime and evolving strategies make it perfect for multiple rounds

This delightful story engages young readers with a heartwarming tale of kindness

The real goal is enjoyment

raising future leaders is one of our most important responsibilities

fueling anticipation with each clue

"Proof of Work" Sweat-Activated T-Shirt Size:Large The quick playtime and evolvingFirst 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.