It is an analysis of the "attitude" T-shirt with a conceptual dimension, dematerializing art and privileging the ideas of the artists in question while transmitting messages with a powerful impact on the public. We will evoke the Lettrism, while taking Kruger and Holzer as examples. In their case, the T-shirt will be written and read. We will also study the experience of conceptual artists like Gilbert & Georges and Nicole Tran Ba Vang with this garment who succeed in conceptualizing it. And to close, we will question the new status of the artwork transposed on the T-shirt. Isn't this collaborative baby a direct result of the hybridity of contemporary art, the blurring of boundaries between art and design and the convergence between these two disciplines? A confusion of genres that will make us wonder about the intention of the author of the work ...