Personalized I'm Four Comic Book Women's V-Neck T-Shirt. Pow! Cool! Ka-Boom! I'm Four! Cool comic book style birthday gift for any four year old superhero's 4th 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