Personalized Kawaii Daddy's Little Cutie Pi Day Math Pun T-Shirt. This unique item is a must-have for math teachers, students, engineers, or anyone who appreciates a sweet and simple pun. The kawaii style makes it fun and appealing, while the math reference adds a clever twist. It's an ideal choice for a special occasion or a daily reminder of a special bond. Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.