Personalized Shamrock Music Notes Women's V-Neck T-Shirt. A shamrock comprised of green music notes is a fun design for family and friends during the March holiday of St. Patrick's Day and Celtic festivals. 5.0 oz., 100% pre-shrunk cotton Athletic Heather is 90/10 cotton/polyester 1x1 rib collar with mitered v-neck Shoulder-to-shoulder taping Ladies' fit