Personalized Trombone Shamrocks Arc Men's V-Neck T-Shirt. Trombone Shamrocks Arc Men's V-Neck T-Shirt - White are a neat way to show your pride in your brass! 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