Personalized Pi T-Tee 3,14 Pi Number Symbol Math Science Gift Adult Sweatshirt. Whether you're attending a math class, a science fair, or just hanging out with friends, this t-shirt is a great conversation starter. Show off your geeky side and inspire others with the beauty of Pi! Stay warm and stylish with this classic adult sweatshirt, perfect for everyday comfort. Crafted from soft, durable fabric, it features a relaxed fit for added coziness. Whether you’re lounging at home, running errands, or enjoying outdoor activities, this versatile sweatshirt is a wardrobe essential for any season.