XL Anatomically Correct Internal Organ T-shirt in Black Our XL anatomically correct T-shirt is black with full-color illustrations of your essential internal organs From throat to small intestine, displayed in both ventral and dorsal views, which is front and back for you anatomical civilians. In heavy, 100% cotton. Perfect for biology and anatomy students and teachers, and for people who need to explain their operations. We recommend wearing it backwards to see if anyone notices.