Personalized Baseball Irish Shamrock Women's V-Neck T-Shirt. A green baseball with the imprint of a shamrock is a unique Irish themed gift design for baseball players and fans on birthdays and St. Patrick's Day. 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