Personalized 78th Birthday Party Women's V-Neck T-Shirt. Get ready to celebrate with this Party 78 Rocks 78th Birthday Women's V-Neck T-Shirt - White. 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