Personalized Trombone Rocks Men's V-Neck T-Shirt. Trombone Rocks with three dancing rocks holding trombones is a humorous low brass design. Fun gifts for musicians at back to school, marching band, birthdays, holidays and graduation. 4.7 oz., 100% pre-shrunk cotton Narrow, set-in 1x1 mitered V-neck collar Shoulder-to-shoulder taping Double-needle stitched sleeves and bottom hem