Personalized Race Car 5th Birthday Women's V-Neck T-Shirt. Start your engines! Fun 5th birthday racing car helmet, pistons, and checkered flags. Perfect for the five year old's birthday party. 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