Personalized My 1st Marathon Fitness Running Adult Sweatshirt. My 1st marathon Adult Sweatshirt - White has cute fitness themed running design that makes a great souvenir. 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.