Isotelus maximus, a giant smooth trilobite of the warm Late Ordovician sea that covered what is now Ohio, Kentucky and Indiana about 450 million years ago, rests on the sea floor in a net of rippling sunlight beside branching bryozoans. It grew to about 40 centimetres long, and its genus, Isotelus, is Ohio's official state fossil. Airbrushed like a 1990s nature tee, only the trilobite and the light are printed, so the shirt shows through as the sea floor. Made from lightweight 100% ring-spun cotton with a soft, sensory-friendly feel. Every order funds kelp restoration on the Pacific Northwest coast.