Personalized Color Block 16 Adult Sweatshirt. Color block 16th birthday Adult Sweatshirt - White with pink and lavender color blocks, birthday cake, balloons and the numbers 1 and 6. 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.