Personalized 4th Birthday Shark Party 4 Year Old Pirate Adult Sweatshirt. Funny shark wears a pirate hat on this 4th birthday design for kids who love sharks and pirates 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.