Personalized Super Trex 1st Birthday Women's V-Neck T-Shirt. Rawr! A Trex superhero wearing a birthday hat is surrounded by a colorful burst of confetti. Cool 1st birthday gift for your one 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