Personalized 6th Birthday Boy Rocket Women's V-Neck T-Shirt. 6th Birthday Boys Rocket Ship Women's V-Neck T-Shirt - Aqua in striped blue and white with number 6 on this space themed bday gift. 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