Wilson's disease is a rare genetic disorder that prevents the body from removing extra copper we all take in (and which we need, in small amounts). In people with Wilson's, this excess copper can cause all sorts of nasty symptoms. No worries, though - typically, it's fully treatable (if not curable). Since being diagnosed with Wilson's earlier this year, I've been really ticked off at copper. Now you can show your real or sympathetic annoyance with copper by wearing this shirt!