This vintage, minimalist design features a stylized platypus head shown in three hat variations, printed in black ink on a warm cream-colored shirt for a clean, retro-naturalist look. Highlighting one of the most unusual mammals on Earth, the artwork nods to the platypus lineage that traces back to the Early Cretaceous, when early monotremes first appeared in the fossil record. 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.