Personalized Race Car 1st Birthday Women's V-Neck T-Shirt. Race car 1st birthday Women's V-Neck T-Shirt - White with red race car, checkered flags and big number 1. Side of car says BIRTHDAY CHAMP. 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