Handpainted Leo apron. My brother in law received a Michelangelo apron as a gift (example- http://ecx.images-amazon.com/images/I/51gCFpilYeL._SY300_.jpg). However, his favorite turtle is Leonardo. Since Mikey is the only turtle sold as an apron, it became clear to me what I must do. I debated going off the merchandise, using a black apron and designing it similarly, but I think going green was a better idea. I used a mix of modern and classic elements; the shell and belt are old school, the scabbard straps are from the current Nickelodeon design.
(By the by, since Michelangelo happens to be my favorite turtle, I now have an apron.)