This vintage-style natural history design showcases the detailed anatomy of a trilobite, one of the most iconic marine arthropods that thrived during the Paleozoic Era, particularly throughout the Cambrian and Ordovician periods over 500 million years ago. The retro, slightly distressed scientific diagram highlights labeled features like the glabella, compound eyes, and pygidial spine, printed in crisp white against a deep navy-blue shirt for a classic museum-field-guide aesthetic. Made from 100% ring-spun cotton (high-quality cotton) with a soft, sensory-friendly feel. Every order funds kelp restoration on the Pacific Northwest coast.