This vintage scientific-style design highlights the extraordinary platypus (Ornithorhynchus anatinus), a living monotreme whose lineage traces back to the Cenozoic Era, specifically the Quaternary Period. Rendered in a retro, textbook-inspired diagram format with fine linework and muted blue-gray tones, the artwork blends natural history illustration with a clean, academic aesthetic on a crisp white hoodie. Made from 80% ring-spun cotton (high-quality cotton) with a soft, sensory-friendly feel. Every order funds kelp restoration on the Pacific Northwest coast. Exterior is made with 100% cotton for a high quality print finish