T-shirts are an essential part of establishing the identity of any Union supporters group, let alone any Union supporter. Bark Tees is a local company that has become an essential part of the local Union supporters scene. Founded by Mark Concannon and Ben Lee in 2009, the company specializes in very cool, very unofficial Philly sports team shirts, the kind of shirts that make you say "That's awesome, why didn't I think of that," and then, "Where can I get one?