Personalized Santa Hat Tuba Adult Sweatshirt. A sousaphone wearing a Santa cap is a funny gift design for tuba musicians, music teachers and students in tuba choir, concert and marching bands at Christmas and the winter holidays. 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.