A whole field of curling symbols turns this into wearable chaos in the best way. Irrational Constants Button Up Shirt is covered edge to edge with looping pi marks, question marks, and other stylized characters in layered shades of blue, with a few bright yellow-green accents popping through the pattern. The all-over print feels dense, clever, and just a little mischievous from collar to pocket.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.