Personalized Trombone Music Joke Long Sleeve T-Shirt. Trombone silhouette on a Long Sleeve T-Shirt - Kelly Green with funny music joke that says The Rest Is Just Accompaniment. 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