Personalized 45 Rocks Women's V-Neck T-Shirt. Happy rocks holding the number 45 and the word rocks below is a humorous gift design for friends and family celebrating their 45th birthday or anniversary. 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