Personalized Superhero 8th Birthday Women's V-Neck T-Shirt. Happy 8th birthday! Celebrate your child's eighth b-day with a cool SUPER 8, superhero gift. Happy Birthday eight-year-old! 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