Personalized St. Patrick's Day Rocks Women's V-Neck T-Shirt. St Patrick's Day Rocks text with three dancing rocks holding shamrocks is a humorous Irish design for St. Paddy'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