In Acceptance Commitment Therapy, or ACT, psychological health is psychological flexibility. Our model for that is the "hexaflex," or Hexagon of Flexibility.
I have the word "hexy" tattooed on my arm -- which I love, because it's nerdy and looks witchy. Also, the Hexaflex itself looks a little like a D&D dice. So whether you want a pentacle shirt, a hexaflex shirt, or to wear a statement against stigma -- here you go.
All styles are available as T-shirts, hoodies (it looks best with design on the back IMHO), tank tops, biker tanks, long sleeve shirts, and V-necks. Carefully designed to reference this social media presence and/or fighting stigma, rather than announcing "here's where I go to therapy."