For his beatdown of Gabe Ruediger, Joe Lauzon had special t-shirts made for his friends and family. Since he was fighting in his hometown of Boston for the first time since making the UFC, there was a large group of friends and family there, so the shirts were everywhere. They became so popular that Lauzon now is selling them on his site.
The men's version is a plain green t-shirt while the women's is a green ringer, as seeon above. Both have the JL Shamrock, and "I love fighting like a fat kid loves cake." You can even request that the shirt is signed by Joe, all for $20.