Personalized 1st 5K Race Running Fitness Adult Sweatshirt. Cute my 1st 5K run Adult Sweatshirt - Black fitness running outfit for girls. 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.