Personalized Triangle Youth 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. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.