Personalized Unicorn First Birthday Adult Sweatshirt. This adorable unicorn is celebrating a 1st birthday. A rainbow of colors and simulated pink glitter make the bday extra special! 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.