Golden pineapples built from repeating pi symbols turn this all-over print into a sharp little visual puzzle. Pi Napple Midnight Button Up Shirt layers those pi-shaped fruits over oversized purple pi marks and spiky green crowns, giving the whole pattern a clean tropical rhythm with a sly math twist. Designed by Nathan, this one keeps the joke in the artwork where it belongs.Product Details Made with Geeknit, our ultra-soft, lightweight, and moisture-wicking fabric designed for all day long comfort Branded buttons Regulaxed fit Continuous design between the left and right side of the shirt and the optional pocket Created with eco-friendly inks that are environmentally friendly Licensed art with most purchases benefiting the artist directly Proceeds from every purchase benefits charity The Hawaiian shirt, also known as a camp collar, has a Cuban collar characterized by a flat, open notch neckline, which is best for laid-back settings. The Button Down has a more traditional button up closure that has a top button and a collar that stands upright and has a more formal appearance.