Personalized Mechanical Engineering Genius Adult Sweatshirt. Mechanical engineering genius with a line of gears is a unique gift design with attitude for engineers and students at back to school, birthdays, holiday and graduation. 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.