Personalized Funny Music Yes Im Treble Gift Long Sleeve T-Shirt. Treble clef music Long Sleeve T-Shirt - Athletic Heather with yes I'm treble humor quote for marching band, choir, a flute player or orchestra or a piano student. 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