The Retro Math Button Up Shirt turns problem-solving into pattern play. A smart collage of formulas, numerals, angles, and geometric sketches wraps the shirt in retro classroom vibes, with the print aligned cleanly across the placket and pocket if you choose it. Designed by Zirkus Design, this artist-backed piece feels light, looks sharp, and is printed with eco-conscious inks for bonus cred. 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.