This black t-shirt features a unique and eye-catching graphic print. In red, the design humorously displays a supply and demand graph, implying that "Happiness in Life is a Matter of Equilibrium." The A and B sections of the graph are also filled in with a matching red color. It's a clever piece for those who appreciate economics, philosophy, or just quirky apparel. Made from a comfortable-looking fabric, this shirt is perfect for casual wear. Show off your wit and style with this conversation-starting tee.