Personalized Triangle Long Sleeve T-Shirt. Triangle text with a percussion triangle replacing the letter A is a unique music design. Fun gifts for musicians, teachers and students aT back to school, birthdays and holidays. 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