Personalized Music Booster Hands Long Sleeve T-Shirt. Music held up by the hands of the word booster is a humorous design for dedicated music supporters and a fun way to show your involvement. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL