Tank Theory is a great t-shirt and art print shop out of Boston, started by two school friends. Together, they bring nice engaging graphics to their t-shirts, and many of the same design directions have inspired screened art prints that are available in a limited edition. Along with their standard t-shirt line, they have a monthly edition, so they always have fresh shirts for sale. They use a water based ink technique, and all their shirts are available in traditional, as well as a slim fit.