Personalized 1st Birthday Rocket Women's V-Neck T-Shirt. Happy 1st Birthday! A rocket blasts off from an alien world with a giant one for the one year old's first birthday! 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